Installed my 2.25 testpipe from testpipe.com and first off I was supprised to see that it actually fit very well flanges lined up nicely and all the only problem I had was that the bolts they supplied for the flange that connect the testpipe to the manifold where to short they are as long as stock but the flange on the testpipe sits back slightly farther then stock so a longer bolts where needed. other then that it fit good. as for the performance? much better then a empty cat the tires are quick to break lose now and the power band feel alittle more broad. the only thing i dont like is that at times between 2500 and 3000 RPM I get the ol fart tip sound the rest is a nice low rumbling tone. very nice!!! ( as for my spelling Im in a rush so get outta my ass.)