Description
H Series Manifold builder
Our Stage 3 Manifold has been tested many times to 300 NA and 1000+ HP on boost and is the choice for many racers needing hood and fire wall clearance for their type of racing as well as many spec limited classes where OEM manifold is REQUIRED
The Stage 3 Manifold is open face with the runners chopped out of the plenum, in order to maximize the amount of plenum volume within the OEM casting, This type of port work is with seriously modified engines in mind looking for maximum top end power. THIS STYLE OF PORTING REMOVES OEM IAB BUTTERFLY PLATE. Pair with open face spacers, of if good clearance is limited gutted oem upper plenum/Twin TB plate
The Stage 2 Manifold is more mild than the Stage 3, the runners in the plenum are merged into 4 separate sections as opposed to the OEM 8 configuration, for a mildly modified street engine, or road race type engine this manifold porting style offers the stronger average power band where part throttle and off throttle response are critical. THIS STYLE OF PORTING REMOVES OEM IAB BUTTERFLY PLATE. Pair with open face spacers, of if good clearance is limited gutted oem upper plenum/Twin TB plate
The Stage 1 Manifold is the most modest of the manifold porting options, it is with lightly modified engines in mind. The runners are opened up and matched to OEM gasket size.









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