Overview
Unlock real performance from your classic Chrysler small-block with the Flowtech Long Tube Header (33100FLT). Designed specifically for LA-series engines (273, 318, 340 & 360), these headers improve exhaust flow and scavenging, helping your engine breathe more freely for noticeable gains in horsepower, torque, and throttle response.
Built from premium .049" (16-gauge) cold-rolled flash-controlled mild steel tubing, each header features Flowtech’s thick, mandrel-formed Power Plenum collector for smooth, high-velocity exhaust flow. All ports are precisely fitted and finished with durable, leak-proof O-ring seals. The silver ceramic coating delivers excellent rust and corrosion resistance while giving your engine bay a clean, professional finish that holds up under heat.
Product Features
- 1-5/8" primary tubes with 3" collector for improved exhaust scavenging and reduced backpressure
- Mandrel-formed Power Plenum collector for better flow efficiency
- Leak-proof O-ringed port seals for a reliable, long-term seal
- High-quality silver ceramic coating for rust and corrosion protection
- Precision-engineered and leak-tested for maximum performance
- Includes all mounting hardware, bolts, nuts, and premium gaskets
Vehicle Compatibility
Fits 1966–1974 Chrysler, Dodge, and Plymouth models with LA small-block engines:
- Barracuda & Challenger (1967–1974)
- Charger & Road Runner (1966–1974)
- GTX, Super Bee, Belvedere, Satellite & Coronet (1967–1974)
- Duster, Valiant, Dart & Demon (1967–1974)
Important Note: Will not fit vehicles with an A.I.R. (smog) pump. Some power steering or steering column configurations may require minor modifications.
Included
- Pair of long tube headers (ceramic coated)
- All mounting hardware, bolts, and nuts
- Premium gaskets
- 3" to 2.5" collector reducers
Important Notes This header is intended for off-road and racing use only. It is not legal for use on emissions-controlled street vehicles. The ceramic coating requires several heat cycles to fully cure. Flowtech recommends breaking in new engines using cast iron manifolds or old headers first. Installing these headers on a fresh engine can damage the coating and will void the warranty. Header wraps are not recommended — they can cause cracking or rust due to trapped heat and moisture, and will also void the warranty.
| Manufacturer Specifications | |
|---|---|
| Air Injection Tubes: | No |
| Bolt Size: | 5/16-18 x 3/4 IN |
| Bolts Included: | Yes |
| Brand: | Flowtech Exhaust |
| California Proposition 65: | Yes |
| CARB (California) Compliant: | No |
| Category: | Exhaust |
| Collector Attachment: | 3-Bolt Flange |
| Collector Diameter: | 3.00 IN |
| Collector Port Diameter: | 3.00 IN |
| Collector Reducer Included: | Yes |
| Collector Reducer Outlet Diameter: | 2.50 IN |
| Color: | Silver |
| Design: | Long Tube |
| Drive: | 2WD |
| EGT Port: | No |
| Emission Code: | 4 |
| Engine: | Chrysler Small Block LA |
| Finish: | Ceramic Coated |
| Flange Thickness: | 0.375 IN |
| Gasket Or Seal Included: | Yes |
| Grade Type: | Performance |
| Header Series: | Flowtech II |
| Header Style: | Long Tube |
| Material: | Mild Steel |
| Mounting Hardware Included: | Yes |
| Oxygen Sensor Port: | No |
| Part Type: | Exhaust Header |
| Port Shape: | Rectangle |
| Primary Tubing Diameter: | 1 5/8 IN |
| Product Type: | Headers |
| Quantity: | Sold as a Pair |
| Sub Category: | Exhaust Manifolds |
| Tube Wall Thickness: | 16 GU |
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Additional Information
| SKU | 24565 |
|---|---|
| Sale Unit | Each |