[OldSkoolBmw]

Well it's not that the 2002 head flows bad. It's actually quite good. Metric mechanic has a list of stock head flows available on their website if you want the breakdown. You have to dig a little but it's there. I have the pics of them if you can't find them. The problem with the 2002 like a few have discovered is the rear end and the stub axles. The rear end is about a 280-300HP worthy unit and the stub axels are good to somewhere around there. Take for instance TEP's Old Turbo 02. I ran into one of the mechanics who built it (small world eh?) and at a brief 340HP on the dyno if it caught traction the diff was in pieces. Another with a turbo m20 at 280 and he's on his 5th unit. If you want 240Hp then you might get away with stock parts but anything more you're pushing the envelope. So before getting one of these sleds and turbo'ing it I'd make sure what your HP goals are. 2L and 7000 rpm and a turbo... easily more than what the diff can. I'm busy trying to put 4wd and a sr20det from a pulsar into mine. Did I mention after 200hp traction is horrible. Back on topic. The heads are fine and can flow. I've got a 15+% gain over stock with creative porting. I've also made a set of 1.5mm oversized titanium valves and had plans for what was gonna be a desmodromic conversion for these heads for really high RPM. 9500+ Roller's never worked because the rocker arm ratio varies during lift due to the width of the pad. This creates an issue with the roller having a fixed contact point (rather mostly fixed) vs the rocker pad's width. Needless it was just time to quit trying to fix a dead horse and go with new. a 75 shot of nitrous will get you a 13 second quarter with one of these cars and sidedrafts.