Exhaust Header for 1965-1975 Chevrolet Chevy GMC Big Block 396 402 427 454 502 6.5L/6.6L/7.4L
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. Whet…
TL;DR: 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…
