SPELAB Exhaust Header for 1965-1975 Chevrolet Chevy GMC Big Block 396 402 427 454 502 6.5L/6.6L/7.4L

Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. SPELAB offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed.

Increases High Flow Air, Instantly Gain 10 -15 Hp. / Tq.

Fitment:

1965-1973 Chevy Chevelle 6.5L 396, 6.6L 402, 7.4L 454
1969-1974 Chevy El Camino 6.5L 396, 7.4L 454
1973-1975 Chevy Laguna 7.4L 454
1971-1974 Chevy Caprice 6.6L 402, 7.4L 454
1971-1972 Chevy Kingswood 6.6L 402, 7.4L 454
1970-1972 Chevy Camaro 6.5L 396, 6.6L 402
1973-1974 Chevy Malibu 7.4L 454
1971-1974 Chevy Impala 6.4L 402, 7.4L 454
1968-1975 Chevy Bel Air 6.5L 396, 6.6L 402, 7.4L 454
1971-1972 Chevy Biscayne 6.6L 402, 7.4L 454
1971-1972 Chevy Brockwood 6.6L 402, 7.4L 454
1972 Chevy Townsman 6.6L 402, 7.4L 454 

Specifications:

Brand Name: SPELAB
Certificate: ISO9001:2000
Application: Automobile Exhaust Header
Material: Stainless Steel
Surface: Mirror Polish
Model:EH28624

Outlet Size: 2.85"
Primary Tube Size: 1.65" square
Head Flange Thickness: 7/16"
Outlet Flange Thickness: 3/8"

Exhaust Header VS Manifold, which is the better choice?

The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold.