Do these systems normally add horses? If so, how much can you gain?

 

they dont really add horses on the LT1s since they already have a pretty free-flowing exhaust. (unlike the L98s). headers will add some power though.

 

i have borla sounds good but not real quite inside but after you get up to cruising speed they are fine i heard all kinds of sound clip before i went to borla they all sound great good luck johnny

 

Went for a drive on the Interstate and the Corsa exhaust is very quite at cruising speeds. At 70MPH the wind and other noises are greater than the exhaust. No resonance at all inside. I would highly recommend this system for somebody concerned about interior resonance. Remember, I have a convertible and the coupe results may be different, but I would not think by too much.

CG