i have a K&N intake too... did you just just put in the 3" downpipe and not the complete exhaust?? n also, did you get ur stock pcm tuned for 60 bucks?? how much horsies do you think ur putting out
yes u can get a 3" dp that comes bolt on with a new cat and u-bend delete all as one unit from zzp
'04 Chevy Silverado LT 4x4 - intake, headers, full exhaust, zo6 cam, 799 heads, tune, leveled, 33's '00 Grand Prix GTP DAYTONA 500 - L36 block, S1X, intercooled, GenV, N*, headers, full exhaust, coilovers, 5 speed swap, stage 3+ clutch