Hemi 6
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"King "Race Connecting Rod Bearing Shell Set (.030") : suit Hemi 6
Suitable in all Hemi 6 engines. These high quality bearing shells are made in exclusive Alecular Bearing Material. Learn More -
"King Race" Connecting Rod Bearing Shell Set (.040") : suit Hemi 6
. Suitable in all Hemi 6 engines. These high quality bearing shells are made in exclusive Alecular Bearing Material. Learn More -
"King Race" Connecting Rod Bearing Shell set: .010" : suit Hemi 6
These bearings are the exact high quality connection rod bearing that we use in our own engine builds. Learn More -
"King" Race Connecting Rod Bearing Set (.020) : suit Hemi 6
These bearings are the exact high quality connection rod bearing that we use in our own engine builds. Learn More -
"Viper Cam" Factory Series E38 Billet Hydraulic Camshaft (only) : Suit Hemi 6
Suit 350 to 600cfm with extractors and spring change required. Auto requires hi stall converter around 2200rpm. Suits all fuels including LPG and PUL. Adv. Duration @ 0.050" Lobe C/Line... Learn More -
"Viper Cam" Factory Series E49 Revised Phasing Billet Hydraulic Camshaft (only): Suit Hemi 6
Suit 350 to 625cfm with extractors and spring change required. Requires hi stall converter around 2700rpm. Suits all fuels including LPG, PUL, and AV gas. Adv. Duration @ 0.050™ Lobe... Learn More -
"Viper Cam" Factory Series SA Police Car (Mild Replacement) Billet Hydraulic Camshaft (only) : Suit Hemi 6
Suit std carburetor up to 500cfm, no spring change required but is recommended. Auto or manual, suits all fuels including LPG and PUL. Adv. Duration @ 0.05° Lobe C/Line Valve... Learn More -
"Viper Cam" Performance Series E49+ Largest Billet Hydraulic Camshaft (only): Suit Hemi 6
Suit 625cfm to webers or injection with extractors. Spring change required. Requires hi stall converter around 3300rpm. Suits all fuels including LPG, PUL and AV Gas. Adv. Duration @ 0.050™... Learn More -
"Viper Cam" Performance Series Race Solid Billet Camshaft (only) : suit Hemi 6
Suit 750cfm to webers of injection with extractors. Spring change required. Hi stall converter around 3500rpm. Suits all fuels including LPG, PUL and AV Gas. Learn More -
ARP Con Rod Nut: Race Series, 12 Point: Hemi 6
A must for any engine rebuild or freshen up ARP The World Leader In Fastener Technology! Automotive Racing Products produce high grade engine fasteners. When building an engine it is... Learn More -
ARP Cylinder Head Stud Kit : suit Hemi 6
Suitable for use on all Chrysler Hemi 6 engines (215ci, 245ci, 265ci.) Direct replacement, no modifications required to fit. Purchase the best studs for your engine, purchase ARP. Learn More -
ARP Main Bearing Stud Kit : suit Hemi 6 215/245/265
Suitable for use on all Chrysler Hemi 6 engines (215ci, 245ci, 265ci.) Direct replacement, no modifications required to fit. Purchase the best studs for your engine, purchase ARP. Learn More -
Aussiespeed Alloy Two-barrel Intake Manifold : Hemi 6
The perfect compromise between premium performance gains & popular 'HOLLEY' carburetor pattern flange, the Aussiespeed two-barrel alloy intake is a high quality casting & 100% Australian made! Suits all Hemi... Learn More -
Aussiespeed Four-barrel Intake Manifold : Hemi 6
The perfect compromise between premium performance gains & popular 'holley' four-barrel carburetor pattern flange. Provides increased torque & mid-range horsepower. Learn More -
Billet Alloy PCV Valve : suit 3/4" grommet hole (polished)
Precision machined hi-quality billet alloy PCV valve. Featuring 3/4'' input with polished cap. Ideal for any application. ** Polished ** Billet alloy construction Learn More -
Billet Alloy Side Plate Kit : suit Hemi 6 (Satin finish)
Dress up your Hemi 6 with this unique Six Pack inspired side plate. Learn More -
Black Cast Piston Ring Set : suit Hemi 6 245ci (.000")
Whether you're building a standard or high performance Hemi 6, using quality parts will ensure your engine is reliable. These are the same rings we use for our in-house engine builds. Learn More -
Black Cast Piston Ring Set : suit Hemi 6 245ci (.030")
Whether you're building a standard or high performance Hemi 6, using quality parts will ensure your engine is reliable. These are the same rings we use for our in-house engine builds. Learn More -
Black Cast Piston Ring Set : suit Hemi 6 245ci (.040")
Whether you're building a standard or high performance Hemi 6, using quality parts will ensure your engine is reliable. These are the same rings we use for our in-house engine builds. Learn More -
Black Cast Piston Ring Set : suit Hemi 6 265ci (.000" / standard)
Whether you're building a standard or high performance Hemi 6, using quality parts will ensure your engine is reliable. These are the same rings we use for our in-house engine builds. Learn More -
Black Cast Piston Ring Set : suit Hemi 6 265ci (.040")
Whether you're building a standard or high performance Hemi 6, using quality parts will ensure your engine is reliable. These are the same rings we use for our in-house engine builds. Learn More -
Black Cast Piston Ring Set : suit Hemi 6 265ci (.060")
Whether you're building a standard or high performance Hemi 6, using quality parts will ensure your engine is reliable. These are the same rings we use for our in-house engine builds. Learn More -
Camshaft Welch Plug, Brass (2-1/8) : suit Hemi 6 & Slant 6 (AP5-CM)
This high quality core plug is suitable for use on the Hemi or Slant 6 engine and is referred to as the "Camshaft plug." We offer this plug in both... Learn More -
Camshaft Welch Plug, Steel (2-1/8) : suit Hemi 6 & Slant 6 (AP5-CM)
This high quality core plug is suitable for use on the Hemi or Slant 6 engine and is referred to as the "Camshaft plug." We offer this plug in both... Learn More -
Camshaft, Gear & Lifter kit : Viper Cams Hydraulic E38 : VCB409 : suit Hemi 6
Get the MOST original E38 cam grind on the market, Best Power, Best Drive-ability! Learn More -
Camshaft, Gear & Lifter kit : Viper Cams Hydraulic E49 : VCB473 : suit Hemi 6
Get the MOST original E49 cam grind on the market, Best Power, Best Drive-ability! Learn More -
Camshaft, Gear & Lifter kit : Viper Cams Hydraulic E49+ : VCB537 : suit Hemi 6
Suit 625cfm to webers or injection with extractors. Spring change required. Requires hi stall converter around 3300rpm. Suits all fuels including LPG, PUL and AV Gas. Camshaft is supplied with... Learn More -
Camshaft, Gear & Lifter Kit : Viper Cams Mild Hydraulic : VCB229 : suit Hemi 6
Suit standard carburettor up to 500cfm, no spring change required but is recommended. Auto or manual, suits all fuels including LPG and PUL. Learn More -
Camshaft, Gear & Lifter Kit : Viper Cams Race Solid : VCB491 : suit Hemi 6
Suit 750cfm to webers of injection with extractors. Spring change required. Hi stall converter around 3500rpm. Suits all fuels including LPG, PUL and AV Gas. Adv. Duration @ 0.050" Lobe... Learn More -
Carburetor To Manifold Base-Plate Gasket : 2-Bbl
direct replacement carburetor base-plate gasket to suit all original equipment 2-bbl carter/email carburetors. direct replacement gasket suits all 2-bbl carburetors Learn More -
Carter 'Black' Competition Series Electric Fuel Pump
If you're looking for a great performing, reliable electric fuel pump; look no further. Carter competition fuel pumps offer the ideal combination of reliability, performance and affordability. Features: 12V negative... Learn More -
Carter Mechanical Fuel Pump : suit Hemi 6
Perfect replacement for a Hemi 6 powered CL. Can also be used with other models running Hemi 6 or Slant 6 engines. Learn More -
Carter Universal Rotary Vane Electric Fuel Pump (72 GPH)
This high flow 72 gph universal electric fuel pump by Carter is a great addition to your vehicle. Learn More -
Case Hardened Manifold Stud & Nut Set : suit Hemi 6 & Slant 6
New replacement manifold stud & nut set to suit Slant 6 & Hemi 6 engines. Includes hi-tensile studs and hi-torque nuts. Complete fastener set Hi-tensile / hi-torque - premium seal Learn More -
Cast Alloy Bathurst Six Pack Rocker Cover Kit (black powder coated) : suit Hemi 6
Our tappet cover is an exact as per original reproduction of the factory fitted cover used on the triple weber Six Pack engines. Sold as a complete set with fitting hardware, cap & grommet. Learn More -
Cast Alloy Bathurst Six Pack Rocker Cover Kit : suit Hemi 6
Our tappet cover is an exact as per original reproduction of the factory fitted cover used on the triple weber Six Pack engines. Sold as a complete set with fitting hardware, cap & grommet. Learn More -
Cast Alloy Six Pack Side Plate : suit Hemi 6 (black powder coated)
Hemi Performance designed and manufactured this exclusive side plate to compliment the factory (or our reproduction) Six Pack cast alloy tappet cover that was factory fitted to triple weber carbureted Hemi 6 engines. Learn More -
Cast Alloy Six Pack Side Plate Kit : suit Hemi 6
Hemi Performance designed and manufactured this exclusive side plate to compliment the factory (or our reproduction) Six Pack cast alloy tappet cover that was factory fitted to triple weber carbureted Hemi 6 engines. Learn More -
Cast Alloy Six Pack Side Plate Kit : suit Hemi 6 (Jet Hot coated)
Hemi Performance designed and manufactured this exclusive side plate to compliment the factory (or our reproduction) Six Pack cast alloy tappet cover that was factory fitted to triple weber carbureted Hemi 6 engines. Learn More -
Chrome Oil Cap : Twist-lock : Sealed - Plain FLAT
Suitable for aftermarket & factory rocker covers that take Twist-in style breather caps. Valve Cover Breather Attachment Twist-lock Breather Shape Round PCV Valve No Breather Tube No Breather Top Style... Learn More -
Chrome Oil Dipstick : suit Hemi 6 (VG/VH) & Slant 6
. Direct replacement to suit Hemi 6 engines fitted in VG & VH models. will also suit all Slant 6 engines. Not suitable for vehicles with hemi 6 rubber sealed dipstick (after VH.) Learn More -
Chrome Piston Ring Set : suit Hemi 6 215ci (.020" )
Chrome Piston Ring set for Hemi 215 3.52" bore. Suit piston ring groove 5/64" 5/64" 3/16" Whether you're building a standard or high performance Hemi 6, using quality parts will... Learn More -
Chrome/Moly Race Push Rod - Suit Hemi 6: STANDARD LENGTH (10.600)
Performance chrome/moly pushrod set to suit all Hemi 6 engines. These precision manufactured pushrods will ensure that your valve train is rock-solid. Quality chrome-moly pushrod set 10.60" in length 5/16''... Learn More -
Chromoly Heavy Duty/Race Valve Spring Retainer: suit Hemi, Slant & Small Block LA Springs
Our valve spring retainers are made from 4140 moly that is specially designed for high stress, high resistance to vibrational contact and harmonic wear. All valve spring retainers are heat... Learn More -
Cometic Cylinder Head Gasket : Multi-Layer Steel : suit Hemi 6 - 3.975" bore / .050" thick (SPECIAL ORDER)
If you're building a high performance Hemi 6 engine, you'll want a cylinder head gasket that can withstand the rigours of high performance characteristics. Learn More -
Cometic Cylinder Head Gasket : Multi-Layer Steel : suit Hemi 6 - 4.040" bore / .050" thick (SPECIAL ORDER)
If you're building a high performance Hemi 6 engine, you'll want a cylinder head gasket that can withstand the rigours of high performance characteristics. Learn More -
Comp Cams Hardened Steel Valve Collet Set : suit Hemi 6
These quality replacement valve locks are stamped and hardened for superior wear resistance. Use these for stock or performance engine rebuilds. Learn More -
Complete Engine Gasket Set (with Cometic Multi-layer Head Gasket) : Suit Hemi 6
Suit all Hemi 6 engine, a must for turbo or extreme performance applications! Hemi Performances own gasket kit , a combination of some of the best gaskets available for the... Learn More -
Complete Engine Gasket Set (with HP Premium Graphite Head Gasket) : suit Hemi 6
Hemi Performance's own gasket kit, a combination of some of the best gaskets available for the Hemi 6! (Gaskets included in this kit are composite and cork/rubber mix - they... Learn More -
Complete Premium Engine Gasket Set (HP Graphite Head, Nitrile Side Plate & Rocker Cover) : Suit Hemi 6
Suitable for Hemi 6 engines. Features HP Premium graphite head gasket, nitrile/cork blend rocker cover and side plate gaskets, and neoprene rear main seal. Learn More -
Crankshaft Rear Main Seal : Neoprene : Suit Hemi 6
Produced with Fel-Pro, this seal is an exclusive Hemi Performance product. This is neoprene conversion. Gone are the days of quality rope seal, "substitute" materials have now lead to leaks and their premature failure. Learn More -
CROW CAMS 6 cyl double race spring - spring rate 330lb/in
Part no OD of Outer ID of Outer ID of Inner Spring Type RH or LH (Outer) Free Length Spring Rate lb/in Solid Height 7333-12 1.456 1.070 0.810 Double L... Learn More -
Crow Cams Hydraulic Camshaft (6602) : suit Hemi 6
Improves throttle response, good highway cam for mild or stock engines : RPM Range 1500-4500 Learn More -
CURRENTLY UNAVAILABLE - Hastings Chrome Piston Ring Set : suit Hemi 6 245ci (.060")
Whether you're building a standard or high performance Hemi 6, using quality parts will ensure your engine is reliable. These are the same rings we use for our in-house engine builds. Learn More -
Cylinder Head Gasket, COMETIC Mult-Layer-Steel : suit Hemi 6 (3.975" bore / .030" thickness)
If you're building a high performance Hemi 6 engine, you'll want a cylinder head gasket that can withstand the rigours of high performance characteristics. Learn More -
Cylinder Head Gasket, COMETIC Mult-Layer-Steel : suit Hemi 6 (3.975" bore / .040" thickness)
If you're building a high performance Hemi 6 engine, you'll want a cylinder head gasket that can withstand the rigours of high performance characteristics. Learn More -
Cylinder Head Gasket, COMETIC Mult-Layer-Steel : suit Hemi 6 (4.040" bore / .030" thickness)
If you're building a high performance Hemi 6 engine, you'll want a cylinder head gasket that can withstand the rigours of high performance characteristics. Learn More -
Cylinder Head Gasket, COMETIC Mult-Layer-Steel : suit Hemi 6 (4.040" bore / .040" thickness)
If you're building a high performance Hemi 6 engine, you'll want a cylinder head gasket that can withstand the rigours of high performance characteristics. Learn More -
Cylinder Head Welch Plug, Brass : suit Hemi 6
For use in Hemi 6 engines. Unique size, limited new-old-stock from Chrysler Australia. Newer replacements on the market do not fit correctly. Learn More -
Dayco Fan V-Belt : 11A1075
Application Guide Build Date Model Engine Application Part number Jun 1971 - Apr 1973 VH 215ci Alternator (with Power Steering) 11A1075 Apr 1973 - Oct 1975 VJ 215ci Alternator (with... Learn More -
Dayco Fan V-Belt : 11A1130
Application Guide Build Date Model Engine Application Part number May 1970 - Nov 1971 VG 245ci Alternator (without Air Con) 11A1130 Jun 1971 - Apr 1973 VH 215ci Alternator (without... Learn More -
Dayco Fan V-Belt : 11A1230
Application Guide Build Date Model Engine Application Part number May 1970 - Nov 1971 VG 245ci Alternator & Power Steering (with Air Con) 11A1230 Jun 1971 - Mar 1973 VH... Learn More -
Dayco Fan V-Belt : 11A1550
Application Guide Build Date Model Engine Application Part number May 1970 - Nov 1971 VG 245ci Alternator (with Air Con) 11A1550 Jun 1971 - Apr 1973 VH 215ci Alternator (with... Learn More -
Derale Automatic Transmission Oil Cooler Kit : Extra Small Rectangular
If you're serious about making your automatic transmission lasts, using an external transmission oil cooler is cheap insurance against transmission failure. Production internal radiator coolers are simply not up to... Learn More -
Derale Automatic Transmission Oil Cooler Kit : Large Rectangular
If you're serious about making your automatic transmission lasts, using an external transmission oil cooler is cheap insurance against transmission failure. Production internal radiator coolers are simply not up to... Learn More -
Derale Automatic Transmission Oil Cooler Kit : Medium Rectangular
If you're serious about making your automatic transmission lasts, using an external transmission oil cooler is cheap insurance against transmission failure. Production internal radiator coolers are simply not up to... Learn More -
Derale Automatic Transmission Oil Cooler Kit : Small Rectangular
If you're serious about making your automatic transmission lasts, using an external transmission oil cooler is cheap insurance against transmission failure. Production internal radiator coolers are simply not up to... Learn More -
Distributor Hold Down Bolt : Slant 6 225ci / Hemi 6 215/245/265ci
This new old stock bolt is the perfect to use as a replacement distributor hold down bolt; with as per factory looks and correct fit. Learn More -
Distributor Shaft Lock Collar
Wonder why you can't seem to get your timing set correctly on your mopar small-block or big-block? Does the timing bounce around all over as you throttle up the engine?... Learn More -
Dual Valve Spring, E49/E55 Spec (single with damper) : Suit Hemi 6, Slant 6, Small Block
This spring is as per E49 and E55 340 factory specifications. Are you looking for a set of high quality valve springs for your engine rebuild? You can't go past... Learn More -
Dura-Bond One-Piece Seamless Camshaft Bearing Set : Hemi 6
Dura-bond bimetal bearings are constructed of seamless steel tube with a thin layer of lead based babbitt material. seamless construction makes installation easy, eliminating breakage and bearing surface interruptions. the lead based babbitt provides ideal properties for just about all engine applications. the babbitt's superior embedability, conformability, and anti-seizure characteristics have proven to reduce engine failures that harder bearing materials can cause. Learn More -
Edlebrock 'Quiet-Flo' Electric Fuel Pump : 120 GPH
Edelbrocks Quiet-Flo Series is a state-of-the-art Electric Fuel Pump offering maximum performance in a compact package. With a Black anodized aluminum housing and high-quality internals, they are both strong and... Learn More -
Endurotec Piston Set (.040" oversize) : Suit Hemi 6 265ci
When building your Hemi 6 engine you want to make sure you use a high quality piston that will give you years of reliable service. Learn More -
Endurotec Piston Set (.060" oversize) : suit Hemi 6 265ci
When building your Hemi 6 engine you want to make sure you use a high quality piston that will give you years of reliable service. Learn More -
Engine Block Welch Plug : suit Hemi 6/Slant 6
For use on Hemi 6 and Slant 6 engines. High quality brass core plug. Learn More -
Engine Block Welch Plug Set : suit Hemi 6
This kit contains only the thickest brass plugs on the market to ensure that they last as longer than your engine build! Learn More -
Engine Mount Insulator : Hemi 6 (Left)
Direct replacement genuine mackay engine mount insulator as found on VG/VH/VJ/VJ/VK/CL/CM chrysler & valiant vehicles fitted with hemi 6 (215/245/265) engine. left-hand side. Learn More -
Engine Mount Insulator : Hemi 6 (Right)
Direct replacement genuine mackay engine mount insulator as found on VG/VH/VJ/VJ/VK/CL/CM chrysler & valiant vehicles fitted with hemi 6 (215/245/265) engine. right-hand side. Learn More -
EVL Exhaust Valve : suit Hemi 6 215/245 & Small Block 273/318 (1.5")
EVL quality exhaust valve to suit Hemi 215/245 and Chrysler small block 273/318 (Head 1.5¨ x length 5.004¨ x stem 0.375¨ x 4 grooves) Special Features Hard faced seat (Cobalt... Learn More -
EVL Intake Valve (Head 1.969" x length 4.976" x stem 0.375" x 1 groove) : suit Hemi 6 265ci & Small Block 360ci & certain 340ci
Intake Valve Specifications: head 1.969" length 4.976" stem 0.375" single groove Special Features Hard faced seat (Cobalt base, Iron base and Nickel base) Monometal & Bi-metal construction Wafer-welded Stem End... Learn More -
Exhaust Valve (Head 1.5630¨ x length 4.5390 OAL"¨ x stem 0.372¨ x 2 grooves) : suit Small Block 318 Poly/Sawtooth
Intake Valve Specifications: head 1.844" length 4.6" stem 0.3715" 2 grooves Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order... Learn More -
Exhaust Valve (head 1.60", 4 groove) : suit Hemi 265, Small Block 340/360
N.O.S. Chrysler Corp 1.60 exhaust valves . GOING! GOING! GONE! The only thing better than a bargain is something for free... sadly we don't have much for free so we... Learn More -
Exhaust Valve : suit Hemi 6 215/245 & Small Block 273/318 (1.5")
Quality exhaust valve to suit Hemi 215/245 and Chrysler small block 273/318 Exhaust Valve Specifications: head 1.50" length 5.004" stem 0.375" 4grooves These USA imported valves are produced... Learn More -
Exhaust Valve : suit Hemi 6 215/245 & Small Block 273/318 (1.5")
Quality exhaust valve to suit Hemi 215/245 and Chrysler small block 273/318. (Head 1.5¨ x length 5.004¨ x stem 0.375¨ x 4 grooves) Learn More -
Exhaust Valve : suit Hemi 6 215/245 & Small Block 273/318 (1.5") O/size stem
Quality exhaust valve to suit Hemi 215/245 and Chrysler small block 273/318 with oversize stem. (Head 1.5¨ x length 5.004¨ x stem 0.375"+0.005¨ x 4 grooves) Learn More -
Exhaust Valve : suit Hemi 6 215/245 & Small Block 273/318 (1.5") O/size stem
Quality exhaust valve to suit Hemi 215/245 and Chrysler small block 273/318 with oversize stem 0.39". (Head 1.5¨ x length 5.004¨ x stem 0.375"+0.015¨ x 4 grooves) Learn More -
Fel-Pro Snapup Tool (holds Gasket and Oil Pan in place)
Every workshop and garage needs a set of these super handy snap ups! Its like having two mates help out without their sweaty arm pits getting in the way! Simply... Learn More -
FEL-PRO Valve Stem Seal (Positive Intake) : suit Slant 6, Hemi 6, Small Block, and Big Block
This high quality genuine FEL-PRO or MAHLE intake stem seal will ensure you don't have oil leaking into your cylinders. Learn More -
Fibre Washer/Gasket: Suit Hemi 6 Side Plate Bolts
Suit all Hemi 6 engines. Learn More -
Fuel Pump Block-Off Plate, Chrome
High quality chrome block-off plate supplied with gasket. For Chrysler 6 and 8 cylinder engines. Learn More -
Fuel Pump Gasket : suit Hemi 6, Slant 6, Small Block & Big Block
Suits all Chrysler engines, Hemi 6, Slant 6, Small Block and Big Block. Learn More -
Gates Fan Belt : 11A1075
Gates XL® V-Belts are for the most demanding engine drives. Open product page to view specific engine applications. Learn More -
Gates Fan Belt : 11A1130
Gates XL® V-Belts are for the most demanding engine drives. Open product page to view specific engine applications. Learn More -
Gates Fan Belt : 11A1230
The Dayco Top Cog® V-belt delivers more flexibility, and increases airflow around the belt, so it runs cooler and lasts longer. Open product page to view specific engine applications. Learn More -
Gates Fan Belt : 11A1550
Gates XL® V-Belts are for the most demanding engine drives. Open product page to view specific engine applications. Learn More -
Gates Fan Belt : suit Hemi 6 With Alternator & HP Air Con Bracket Kit
Gates high quality factory style replacement V belt. Suits all VG/VJ/VK/CL/CM, 215ci 245ci 265ci hemi 6 engines with HEMI PERFORMANCE air conditioning conversion kit. A little about Gates belts: Gates... Learn More -
GM Alternator Conversion Bracket Set : suit Hemi 6
This Hemi Performance exclusive bracket set allows you use any GM SI-10 Style Alternator directly to your Hemi 6! Learn More -
GMB Japan Water Pump : suit Hemi 6
High quality replacement pump suitable for use in all Hemi 6 engines. This pump is a genuine GMB Japan product. Learn More -
Graphite Rope Rear Main Seal : suit Hemi 6
Rebuilding your Hemi 6 engine and need to seal the crankshaft rear end? Install a high quality graphite impregnated rope (wick) seal for the best results. Suits all Hemi... Learn More -
Hardened Steel Valve Collet (3/8 2 Groove lock)
These quality replacement valve locks are stamped and hardened for superior wear resistance. Use these for stock or performance engine rebuilds in street applications with valve spring under 550 valve... Learn More