when fitted correctly, Vipers have proven to gain performance.
I'm never buying one again but hey,
Had one on my Saxo, did'nt like the way the garage mounted it. I re-mounted it with the CAF facing forward ; did some cutting so it would end up behind my grill.
This way it was actually noticable that i was driving round with a 200pound IK filter. The peformance was better after PROPER fitting... by myself :approve:
Anyway , my next move is to try a Mk1 airbox with ITG filter and change the CAFs for little bigger size. I've grown confident in finding good fitting sollutions