AP1 and AP2 exhaust
#4
Yes they are, I have a ap2 exhaust on my ap1 right now. When hanging it you just need ap2 hangers or you can just use the outside holes on the ap1 hangers and it lines up perfectly. MANY ap1's have ap2 exhausts on. A quick google search gives that same exact answer.
#5
Community Organizer
Completely interchangeable but may need proper hangers as stated above. The Helmholtz is a different shape on both systems but will fit either car, less clearance with an AP1 exhaust on an AP2 chassis though.
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#8
#10
Site Moderator
I think there is a slight difference in the 06+ floor but I would be shocked if the exhausts were drastically different. 00-05 fits you just need the right hangers like others said.