Option for ceramic coating available for an additional cost
 
Our very own Thornton design- a direct replacement for an exhaust manifold.
These headers are a polished 304 stainless steel, with a 1/2" thick steel flange in order to prevent warping.
 
Please read the details below to ensure this is the correct purchase for you:
 
-Primary tubes are 1 5/8"
-Collector is 3" wide
-Exhaust flange is cut to accept a 2 1/4" or 2 1/2" exhaust.
-Adapter is needed to fit other sizes.
   These headers will only fit big block Oldsmobiles with 455, 425, and 400 engines from 1965 to 1976.    This excludes 1965-1970 B and C bodies because the steering box is rear mounted (towards the fire wall), as well as any other Oldsmobile with rear mount steering.   While they can fit 1965 Cutlass 442 they are a very tight fit.
   
The Tornados are also excluded for clearence issues as well as Omega
 
-If you can fit factory exhaust manifolds, then these headers will fit without any modifications.
-Our headers fit a factory 4 speed manual transmission with clearence to the Z bar.
-They also mate up to a standard exhaust head pipe measuring 2 1/4" or 2 1/2".
-They will easily connect to down pipes for a big block Oldsmobile.
-Ceramic coating is available as special order.  Returns on special order items will be considered at our descretion and may incur a 20% restocking fee.  All shipping charges are buyers responsibility.
 
Please feel free to contact us with any questions!
Sold as a pair, with gaskets.