APR hasnt done much R&D for the B5 S4 community lately. They came out with a chip, bi-pipe, exhaust, and a stupidly overpriced $9000 K04 turbo kit years ago but nothing since then. Courtney@APR is too buisy posting online to advertise a $10 price cut on an $1100 cat back ( less than 1% price drop)

Places like ASP, VAST, and EPL keep pushing the limits trying to come out with new innovative products. (and when they offer a discount its alot more than 00.6% price drop)

GIAC is better in alot of ways, you just dont get the cruise control switcher.

 

go custom...more fun