Which headers and catbact? 07 5.3 Avalanche
#2
most people on here are probably going to tell you that shorties are not worth it. very minimal gain for the price and effort of the install. long tubes are where the power gain comes from. there are probably better headers out there but i got the pacesetters with ory from texas speed. decent budget header. for catback you cant beat magnaflow for performance/cost imo
#3
Long tubes are worth it , maybe pacesetters if ur low on budget other than that i would go for ARH , for the exhaust u either go for magnaflow or corsa.. look up exhaust sounds on youtube that should help
#4
I just may start a fight, but here's another option. Price compare headers, CAI, exhaust, to a junkyard 6.0L. While you only get a couple more hp with the 6.0, you'll get the torque needed to pull the 20ft toy hauler!
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