bitemark4.6 put down about 300 rwhp on his 96 cobra and he doesnt have the new style heads just some basic stuff and minor tuning. As far as suspension, you will not find a larger aftermarket for any other car other than the mustang. Griigs, Maxiumum Motorsports,Saleen, Steeda and D&D pretty mcuh full roadcourse setups, then there is companies like CE, BBK, BMR, Grantielli, X2C, and a shit load of others that make lots of basic upgrade parts as well as some hardcore stuff too.