CNC Modified “Tru-Ram” Exhaust Manifolds

DSCF2383                                                       CNC “Tru-Ram” Cast Iron Small Block Chevy Exhaust Manifolds

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 Adapters are the starting point for a hassle-free, performance exhaust system. Supplied with 1/4″ flange and mounting hardware. Available for 2 1/2″ & 3″ pipes.

Tru-Ram Manifold machined for Gasket-Less adapter

Tru-Ram Manifold machined for Gasket-Less adapter








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

Intake Manifold FAQ’s

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.