Yep - people who say 2.5" for more power really are just listening to bad advice
2.25" on my ITB'd cup with sports cat - no restriction at all
I would try avoid the mild steel system, in under 20k mine cracked twice.
I would probably say 2.5 for a balls to the wall build
I have the 2.25 mild steel stealth on mine. It's no restriction at over 210bhp, and that's with a cat
2.25 on the race car 215bhp
I'd avoid the ktec stealth tbh. As an ex-owner I'd say it was a poor system, wish I'd of reasearched better.
The standard system is 2.25", I've noticed no difference when changing to 2.5" systems on either of my 1*2's except noise.
Yep - people who say 2.5" for more power really are just listening to bad advice
2.25" on my ITB'd cup with sports cat - no restriction at all
So it's really just which one takes my fancy
shiny or not shiny