Description

The exhaust manifolds found on the 1967-1972 Big Block Chevy engines were designed to combine the exhaust gasses from each of the cylinders quickly with a manifold that was cost effective to produce. Our 4-1 Long Tube off-road headers are designed to allow the exhaust gasses to flow more freely from each cylinder bank and combine in a more efficient manner. Tubing has been optimized for the 396, 402, 427 and 454 engines. This creates a reduction in cylinder backpressure and improved exhaust gas velocity. These improvements free up lost horsepower and torque. An added benefit is a more performance oriented exhaust sound.
Package Included:
1 x Header exhaust system
All necessary installation hardware
Compatible with:
  • Made of high quality steel with 2-pieces 4-1 direct bolt-on design
  • TIG welded CNC machine flange
  • Inlet: 2" / Outlet: 3.39"
  • Increase high flow air, instantly gain 10 to 15 Hp. / Tq
  • Application: Please check part finder on top of the page (Professional Installer is Highly Recommended) (No Instruction Included)

Chevy Big Block Long Tube V8 4-1 Design 2-PC Stainless Steel Exhaust Header - 396 402 428 454

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