
Originally Posted by
Dawings33
IMO if you run fully ported heads and you are going to stay m90 the XPZ is your best bet if you dont want to go full XPZ a S1X or XP will also make good power. Stage 3 and 4 cams tend to like a larger power adder to be worth it. However if you do plan on running nitrous you may be able to get away with a bit bigger cam. The problem you run into here is that a M90 loves a intake bias cam and a nitrous setup will love a exhaust bias cam. So you will have to make that choice.