Hey guys, I a fun time at Firebird last night. Ran a 13.5 with street tires. Remember, my car is stock, and the track wasnt the greatest. I was in my local Checker Auto Parts, and I saw a K&N intake on display, and it said that in the '03-'04 Cobra, it will add 30 hp. Is this an accurate claim? I have a K&N air filter now, but after seeing other Cobras running in the low 12's, I want to slowly start getting there. What do you all think?