Reviewed By nathan s (MILLS, WY) Reviewed for a 2014 GMC Sierra —6/14/2016 2:22 PM
I always read that these improve sound, but I didn't know it would make my truck roar. When I accelerate it's so beautiful. Without re-tuning my truck, the I take improved the 0-60 .22 seconds. Assuming more with correct Cai tune. Well worth the price.