which one would offer the most gains in performance? Also how is the sound? I like how cobb looks stockish but helix seems to have that deeper boxer growl. Also the cobb exhause is a lot more expensive (cobb website vs gruppe-s price) than the helix so does its perf justify the price difference?

 

no opinions at all?

 

cobb takes teh win. hands down.

 

I have not heard COBB, but Helix is a great system. Lots of people use it. You should read the reviews in the REVIEW section. https://www.i-club.com/reviews/showcat.php?cat=7

 

cobb vs helix is like night and day. One is quiet and one is effin loud. One has a small tip and one has a big tip. As for just the catbacks, the differences in the power gains isn't by much.

 

not sure if there are any sound clips for the helix exhaust but if you go to cobb's website, they've got clips and it sounds perfect!!!!