Reviewed By Angel S (Mcpherson, KS) Reviewed for a 2009 GMC Sierra —3/11/2015 8:43 PM
I could definitely tell the difference and the sound it makes.
Reviewed By Jimmy E (Theodore, AL) Reviewed for a 2009 GMC Sierra —3/7/2015 3:14 PM
auto tune has the best prices on things for my truck . so far I bought a superchip , K&N AIRFLOW KITS I AM VERY HAPPY WITH BOTH OF THEM GOOD CUSTOMER SERVICE AND GOOD PRICES ON GOOD ITEMS ,. THANK YOU AUTO ANYTHING