Quote:
Originally Posted by boostaholic786
If im not mistaken, the e92's dont have resonators at all. Only the e90's come with resonators and Iam pretty sure your 335is is the same set up as the regular e92 just different muffler. If I was you I would take out the secondary cat because its pointless anyways meaning it doesnt have any sensors or anything like that and you will gain a pretty decent amount of power as well. Especially with your new AR downpipes you will definently see a bigger difference when the secondary cats are gone. You will also get that sound you want. If thats not enough, take the secondary cats off and put a loud muffler on the back or just run straight pipes. You will definently get that gurgle and more rasp if thats what your looking for. Different strokes for different folks.
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wow thanks that was really helpful. i think I'm gonna go for those borla pipes i linked.