Quote:
Originally Posted by rahlow
I think user B58 had the 5" catted downpipe but recently switched to the 4.5" catless like the most of us. Curious on his opinion there. I've always had the ER catless and it's been great.
|
It made absolutely no difference going from the 5" CG catted to a 4.5" catless. Everything feels the same my car just smells like shit now, pops a little more, and spits flames out from meth exiting the exhaust when it gets really hot. Power wise and throttle response are the same. I'm running the 42Draft o2 spacer and its never thrown a check engine light. I only went catless because once BEF is out i want to switch to a pure stage 2 and get the best flow possible.
This is listed for VW/Audi, but it works on the BMW. I had this spacer on my 2016 GTI and took it off and kept it and now it's on my 340i:
https://www.hstuning.com/42-draft-de...or-spacer.html