MON-E-pIT

I just bought a 2001 silverado 1500 5.3 4x4.
I could not wait and just recently put a new set of asm headers on and cannot decide what I should do with my exhaust.

I would like to keep my stock cats for daily driving unless there is a way to pass a smog test w/o them. so cut outs will most likely be put in.

should i run x-pipe, or a y pipe, true duels etc... i would also like to dump the exhaust some place around my rear axle.

I will be installing a pretty big cam, built heads, converter, boltons and 125 shot, so i will need pretty good flow but not overkill.

I don't want it to be too loud for daily driving ( the girls wont like it)

thanks, any input will be helpful.[/FONT]

CrabhartLS1

The stock cats are fine unless you're running forced induction. I suggest either LTs to a Y pipe to a hooker aerochamber, or duals to aerochambers.

hooker aerochambers are good for quiet systems with LT's, they almost sound stock at idle, no drone, and only get loud at WOT. They flow just fine too. If you're not running cats, they'll still sound very good and mostly quiet.

MON-E-pIT

Can I pass inspection if i use o2 sims?

CrabhartLS1

depends on what's being inspected. If they only check codes and nothing else, then yes. If they do the sniffer, then you won't pass unless you plug your exhaust pipes with foam or something, which i've heard done but never actually done.

If they're doing a visual inspection, it again depends on whether they're strict enough to make sure the cats are in the stock location or if you just have cats period. If they're making sure the cats are in the stock location, you'll fail automatically with LT's, this would be states like California. If they're simply checking for cats and arn't concerned with the stock location, then you can get by with gutted cats.

jchorner99

arent you going to need a tune anyway.... then just have them turn off the rear 02's..

ive alwas liked the single 3" dump'd

TXsilverado

iTrader: (19)

if your in texas its easy to get around the inspection...

Last Call

iTrader: (4)

That must be nice. We in Cali get shitty 91 octane and some of the strictest smogs refs around.

angelofdeath

true that! i might take out my LTs when i get my smog. even my boys can't hook me up on my smog. they said the systems now are different.

Last Call

iTrader: (4)

Sup Rein! Yea, your exhaust sounds sick. And smog in cali sucks ***!

$thatguy$

iTrader: (5)

in mississippi no body cares at all... we have nice farm land and clean air to polute haha