Our CNC Modified “Tru-Ram” Small Block Chevy cast iron exhaust manifolds combines the quiet, durable function of cast iron with the best performance available in a cast iron exhaust manifold. These are the same “Tru-Ram” manifolds you can purchase from vendors like Speedway Motors. On stock unmodified “Tru-Ram” manifolds, the port openings are smaller than most aftermarket cylinder head exhaust ports. Also, you must run a flat flange with a gasket for an outlet pipe. Even in mild performance applications, the flat flange with a gasket just does not hold up; they tend to burn out often. To produce more power, we CNC machine the port opening to 1.525″ x 1.525 size. This is larger than exhaust ports on all aftermarket heads. For better reliability, the outlet is machined for Gasket-Less Adapters. Gasket-Less Adapters are available to connect 2 1/2″ and 3″ pipes.
CNC Modified Tru-Ram Exhaust Manifolds – $495.00 per pair.
Gasket-Less Adapters for Tru-Ram Exhaust Manifolds
The best way to start building your exhaust system.
GasketLess Adapter Pipes: Metal “donut” sealing ring is tig welded to pipe to provide a positive leak-proof seal. 1/4″ thick flange provides the clamping power. Each. 1 side only.
#164AF-1: 1 only 2 1/2″ GasketLess Adapter – $55.00
#164SF-1: 1 only 3″ GasketLess Adapter – 60.00
Free Custom Camshaft: Now, with your purchase of a complete set of modified heads and a matching, modified intake, we will supply a custom ground flat tappet camshaft designed specifically for your application.
Cylinder Head Design Form: Fill out our online form for a recommendation and pricing on a set of heads built specifically for your application. Also, here is a link to more detailed information on our Complete Cylinder Head Assemblies. Cylinder Head FAQs
Sending your cylinder heads to us for modifications? Check out our head shipping tips.