8202632

Just got these installed on my 09 CTTS this week. Let me say that there is a marked improvement over the entire RPM range. It is definitely jumpier and they reduce turbo lag immensely.

The sound is also improved. You can definitely tell from the inside (you do have to listen carefully though), but from the outside, it's amazing. Cold startup is twice as loud and during takeoff it is much more aggressive from the outside. My wife was driving and I was following her in her GL and it sounded SO much better.

I'm very happy with this mod and would recommend to anyone looking to improve overall drivability as well as much improved sound!!!

Cpa4S

i think i am finally going to put them on this year as well.

John@Fabspeed

Excellent description! I am glad that you are pleased with the sound, throw some pictures up of the beast if you have a chance!