Originally Posted by Malefic_GP

What are you? A noob?

My SLP header gave me 25 hp, SLP exhuast = 15 hp, and K&N intake = 17 hp. A total of 57 hp added on.

For the 99 looking at the mods I see that the K&N intake gives him 13hp, SLP headers =25hp, and SLP exhaust = 15hp. A total of 53hp.

The headers gives him the 20 hp you said and 5 hp more. Just go on 3800performance and look up the parts and hp.