The exhaust manifolds found in the 1966-1996 Small 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 Block Hugger 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. Block Hugger style headers are meant to be used where space for long tube headers isn?t available due to steering and cross member clearance issues. Tubing has been optimized for the 5.0L(305ci), 5.3L(327ci), 5.7L(350ci), and 6.6L(400ci) 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 systemAll necessary installation hardware
Product Features
- Made of high quality steel with 2 x 4-1 direct bolt-on design
- TIG welded CNC machine flange
- Metal gasket included / Inlet: 1.75″x1.5″ (Oval) / Outlet: 2.5″
- 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)
good quality, came with everything you need to install Very well made, good quality, came with everything you need to install. It even came with new bolts with was nice. I installed them on a 63 impala with a 283.
DONT BUY DONT BUY IT!!!!! Doesn’t fit any car like it says and then if you want to return it, they’ll accept it but you have to pay to ship it back but it’s heavy af so it would cost almost as much to ship it back as it did to buy it
Really great headers for the money Really great headers for the money. They fit well and went right on with no problems. The extra thick flanges are a real plus; almost 3/8″ thick. Sealed well and no exhaust leaks.