Originally posted by 03silverado5.3@Sep 21 2004, 04:13 PM
The headers are on not the exaust. So it sounds like everyone thinks the tips are to big which would you use. The muffler is a 5X11X22" body 2 1/2 in & out PART#14568. I want my truck to run mid 13s along with the mods I have and Volant cold air, Electric fans, TT2600, 3.90 gears, And Im thinking the same comp cam 02 Denali has. I am hopeing that will get me there. Oh yea some Drag radials and TB spacer. HaHa. I appreciate youre advice.
Yeah, I don't like tips myself. I hide the tailpipes behind the bumper a la old Cadillacs/TownCars. Plus it limits resonation too. Tips act like a megaphone only.

I think it's going to take a bit more than the 5.3 to get you into the 13s all motor. I like 02's cam but it lacks on the lift and could use a more aggressive lobe IMO. Basically I think there is better stuff out there on the custom end from Comp. Allen is a Comp dealer soooo... find out which lobes you prefer and have a cam ground from there.

An LS1 or 6.0 swap would probably get you there with more ease.

Oh yes, I have the similar muffler in my attic to install... DI/DO Magnaflow w/ built in X-pipe.