Originally Posted by
JAP-S2K
Um.... Valves and valve springs would be the first, obviously with cams. A factory engine fitted with cams would only see 10,000rpm a handful of times before a major engine failure. Start thinking more like spending $15K for your engine to rev reliably. Dry sump, cams, valves, valve springs, full engine blue print and rebalance, major head work including porting, injectors. You only need to see what all the major japanese tuners run on there F20c's. Really not worth the effort, $$$ for the power gains.