Reviewed By Danny C (KATY, TX) Reviewed for a 2015 GMC Sierra —6/27/2016 2:43 PM
The first 100 miles it was noisy, but then I got quiet. I notice a little decrease in the mpg.
Reviewed By thomas f (BOONESMILL, VA) Reviewed for a 2005 GMC Sierra —3/17/2016 4:26 AM
Simple install, has that typical whistle between 2,500 and 4,000 rpm. Note: didn't whistle at 1st but did after I seafoamed my truck to improve performance. Definitely pulls hills better. No need for the expensive metal ones.
Reviewed By Chris S (San Diego, CA) Reviewed for a 2015 GMC Sierra —3/12/2016 11:07 PM
This seems to be a good CAI. Haven't had it installed to long so can't fully speak on a review as when I first got it I had a hiccup with mine. Auto anything stepped up and took care of it though and got me squared away. I couldn't be happier now it's installed. Between my Super 44 exhaust and the CAI that thing can get loud. I love it. Working on programming it in now.