I talked to Myron Cottrell today, owner of TPiS and he said dyno testing is showing a hp drop at high rpms with the Donaldson on '02s. They think it may be due to the maf redesign. They are working on a solution, but advise not to do the Donaldson on an '02 for now. TPiS was the designer and original marketer of the Donaldson Blackwing aka Air Force 3 aka LS6 filter. The Donaldson does work great on '01 and earlier Vettes. Probably the best non-bottom breather available. The '02 issue may be on all '02s not just Z06s.