Chevrolet Small Block Headers
YES! Thornton designed headers for small block Chevy. Made for an easy fit with out the hassle of exhaust leaks. 
These headers were designed from a 1969 Camaro cast iron GM manifolds 3942529 and 3932376. They are a stock replacement for factory manifolds.
They will A, F, G and X bodies; Chevelle, Camaro, Z28, Nova, Malibu, 2WD Chevy P/U, El Camino, 4 speed and automatic cars with or without air conditioning.
  • These headers will fit in the same cavity as factory exhaust manifolds 
  • No need to move brake lines 
  • Mini starter is not needed
  • 1 5/8” primary tubes, 3” collector with factory fit 2 ½ exit flange (same as big block) with stock style exit flange and fits standard stock big block down pipe
  • They work with factory heat riser valve  
  • They work with air conditioning and power steering alternator  
  • Stock style exit flange with 3 bolt design with donut for no leak design
  • Uses stock big block down pipes
  • Thick, flat flange at cylinder head that will not warp 
  • They are designed to fit in tight spaces, same as the stock manifolds
  • Exit flange is located in same spot as the original but with a much larger outlet
A short spark plug is needed, this is common for headers.
We have test fitted them to a 70 Chevelle with a 350, power steering and ac. The #2 header tube is very close to the steering shaft but clears. Minor modification was needed for AC compressor support bracket and the power steering pump needs a spacer.

Chevrolet Small Block Headers

  • Satisfaction guaranteed. All returns and exchanges are accepted within 30 days; no questions asked. The part must meet the following requirements:​

    • Part is unused

    • Part is unaltered

    • Part is in original finish

    • Part to be shipped back with original packaging 

    ​We must be notified about the return so we can ensure a proper return/exchange process. We will send a call tag or return label via email. Shipping charges cannot be refunded, and customer pays return shipping.

    Returns are subject to restocking fees if not returned in original packaging or deemed poorly repackaged. Any and all fees and duties associated with your purchase, are your responsibily.