Reviewed By Sawyer B (SALINE, LA) Reviewed for a 2014 GMC Sierra —10/16/2014 3:26 PM
Installed on a 2014 gmc Sierra in 4 1/2 hours that's taking old ones off and install fitment was east it's a can do at your own home
Reviewed By Nathan T (Brookings, SD) Reviewed for a 2008 GMC C/K 1500 —2/22/2012 10:13 AM
These headers were purchased to help my little half ton, as I pull an enclosed trailer with four or five of my motorcycles on vacations. They have given my truck a noticeable gain in power, accompanied by a vararam ram air, and banks monster exhaust. What amazes me is the increased mileage. I burn e85, and in town stock my truck was averaging 8.6 miles per gallon, it now is averaging 12.8! Two miles per gallon better at interstate speeds! It will make your truck noticeably louder, and in four cylinder mode it sounds, well, like it's missing on four cylinders. Lol the positives well outweigh the negatives.