When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Horsepower? Not much. I paid $920 shipped to my door for the bullets. I have never heard a single bit of drone and do a lot of highway driving(took the vette from Jersey to Miamii a couple months ago). It also sounds relatively quiet in the cabin as opposed to what it sounds like to people outside the car. Really the best cat-back on the market for these cars.
This is what my car made with just the GHL bullets and a tune, no other mods:
I love the sound of the bullets on my car, but I didn't feel any real SOTP diffrence in power. I have an A4 car and with 2.73's and there was a definite drone between 1450 & 1550 rpm or 55 mph.
i have arh long tubes with x pipe matched up with ghl bullets sounds so sweet muscle car rumble
sorry NO catbacks will give you much hp gain but the sweet sound is worth the price