View Full Version : Ported Oem Tpi Plenums
Revis_Racing
09-20-2002, 07:37 AM
About how much hp does a ported oem plenum yield, and how much does it move up the power band?
Z_Ghost
09-21-2002, 10:30 PM
You will pick up a little bit, maybe 10 HP or so, it does let the motor breath a little bit more on top end.
The runners are still a bottleneck as is the intake and heads.
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