M3 Bypass track pipes

[Jerez]

Guys,has anyone removed the primary cats with a straight piece.Leaving the secondaries and the resonators.

Feedback please

 

[ASH M]

Do everything, a fully decatted x-pipe is awesome :thumbs:

 

[Jerez]

Evolve automotive offer the x pipe but I'm going to have emission issues.. It's a bit different up in the north. Decibels is also an issue

 

[ASH M]

Oh, i forgot about you guys. I really feel for you. Don'y think anyone this side has done just the primaries and left the rest stock.

 

[Jerez]

Oh, i forgot about you guys. I really feel for you. Don'y think anyone this side has done just the primaries and left the rest stock.

The rears are m performance pipes.im just concerned about drone - this is not a car I track so it may be a waste of my time and money. Besides, I'd need to do a stage 2 remap if I was to do the primary cat deletion. With my stage 2 induction , lightened m performance exhaust , p cat deletion and stg 2 evolve remap , I should dyno at 446/450.And that's it.... Or think hard about a SC - lol- not