Stage III CNC Gasket Matched and Ported Manifold

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Product Overview

JMTC S3 Ported Manifold


What good is a high flow ported head if the biggest restriction is in the exhaust manifold? The Mini manifolds and even a JCW manifold were only designed for air flow around 250hp. Once you add a big turbo, intake upgrades, and a ported big valve head the exhaust manifold will soon become the biggest restriction in the system.  The exhaust manifold port diameters are just to small to for the engine to reach its full potential at the top-end.  So we developed our Stage III ported manifold which is hand ported manifolds, CNC expanded at the turbo, and port matched to the head. 

JMTC’s Stage III CNC port matched (exhaust side) and opened up on (turbo side will need to be matched by customer) is the only manifold on the market that will allow the engine to flow to its full potential.  The work we do to the Stage III manifold will out flow the JCW manifold while retain the twin scroll port for quick spooling of the turbo.  this way you get a great top-end and don't loose any torque.

Stage III Ported Manifold

  • CNC gasket matched the head
  • Opened up by 8mm on the turbo side
  • Hand ported



JMTC inspects and repairs all refurbished parts so they will operate properly, however refurbished means this part has been previously used and may have defects.  

Pre-shipped manifold core is $150 the money will be refunded once a usable core is return to us. 

Damaged or cracked core and pre-shipped manifolds will be repaired. 

The turbine housing will need to be mached to the exhasut manifold. 





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