BowtieKyle

If you want your truck to be louder than your friends, then dont run a muffler, it wont be too obnoxious. If you wanna try it out, all you have to do is unbolt your y-pipe and get an idea of how loud it is with just cats on your truck. Simple as that. You should honestly find people you know with exhausts on their truck, find out what they have and base your decision on what sound you like, not what people on here tell you. There isnt really much need to run true duals unless you just want them. a single muffler in place of your stock one, with a turndown or duals out the rear, however you want will be just as efficient. If you leave the cats on the truck with the stock 2 1/4 exhaust tubing, that will be the most restrictive part, so having a true dual setup after that will not net any more performance gains than just a single high flow muffler in place of the stock one.

04sierra

Your exhuast will be quieter with cats than without them. The Delta Force 40's will be a little quieter at idle that the original 40's. The 10 series will be really loud, I think they are intended to be a race muffler.

STOCK_SUCKS

If You Want To Be Louder Run 1 Bullet Dumped In Place Of The Stock Muffler
Thats If You Want Loud With Cats I Woudnt Recomend Doing That With No Cats

99Silver6.0

iTrader: (1)

I actually ran my truck without a muffler for a while. Was god dam loud and sounded kinda cool. But it was to breathy, needed a good tone. I wanted the Borla rasp. Im gonna yank my cats here before long.

99silverado327

Even if i get an 03 or 04 would high flow cats help or not? But i guess im gonna go with the orig. 40's. Will the offset in/ center out mufflers fit? But im on the hunt for another truck so i dont really know what i will find. Its gonna be a 99-04..

cstchevy

yeah off set out withcenter in 2.5 piping should work fine.

99silverado327

U said offset out/ center in. I Really meant offset in/ offset out. Will those work or not??

RED2K

i had them and went to magnaflow. I never looked back plus the mags with no cats sound awesome. GEt the 40's like i had if you want loud

cstchevy

I would do a center in and off set out. or center in center out would also work. you can pretty much make anything work.

99silverado327

I cant find center in/ center out well i did but they r 81$ a piece and my friend has those but i dont know if he will sell em yet and they r like 4 years old. I cant find center in/ offsent out either. I found offset in/ center out.