Flowtech long-tube headers for Chevy Big Block 396–454 (1964–79) – premium performance exhaust headers designed to increase power and torque in classic Chevrolet big block V8 muscle cars.
- Long-tube header configuration for optimized exhaust flow, improved scavenging, and measurable gains in engine horsepower
- Precisely engineered to fit Chevy Big Block 396–454 V8 engines
- Compatible with 70–72 Camaro big block applications
- Compatible with 64–74 Chevelle big block models
- Compatible with 64–74 El Camino equipped with 396–454 engines
- Compatible with 71–74 Wagon models equipped with big block engines
- Compatible with full-size Chevrolet models equipped with 396–454 big block engines
- Well-suited for big block engine swap projects, including: 73–81 Camaro; 75–77 El Camino; 75–77 Chevelle; 70–81 Firebird/Trans Am
- 1.75" primary tubes to support efficient exhaust flow in performance-built and modified engines
- 3" collector for effective exhaust gas evacuation and enhanced overall performance
- Black-painted finish for a traditional muscle car appearance and basic corrosion protection
- Installation is possible only with original GM big block engine mounts in frames from the following applications: 70–72 Camaro, 65–74 Corvette, or 68–72 Chevelle
- Not compatible with Chevelle models equipped with Powerglide transmission
- Recommended replacement header gasket: Mr. Gasket P/N 152
- The original exhaust system must be modified to retain catalytic converters where required
- Supplied with complete mounting hardware and premium gaskets to support a straightforward installation process
- Compatible with factory air conditioning and with both automatic and manual floor-shift transmissions
Additional shipping charges apply for these headers due to their oversized dimensions and weight.
Sold in matched pairs for complete installation on Chevy Big Block V8 engines.
