Porting the upper manifold yields little to no gains from what I seen being discussed on this forum. Porting the lower manifold is where you see most of your gains.
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04-15-2015, 12:18 AM | #3 (permalink) |
A True Z Fanatic
Join Date: Apr 2013
Location: st. petersburg
Posts: 5,707
Drives: 09 nissan 370z Sp M6
Rep Power: 295378 |
Porting the upper manifold yields little to no gains from what I seen being discussed on this forum. Porting the lower manifold is where you see most of your gains.
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