those numbers are complete bullshit...
a near 50% gain in flow just by removing a cat? Thats retarded....

 

anyone got sound clip of catless dp on s.c i m thinking about buyin one for cheap but i dont want my car to sound like **** the one im getting is vibrant catless dp

 

Yeah can we get some vids.

 

No cat.

Been running a cat-less downpipe on mine for 2 1/2 years, and 58k miles later, car still runs and sounds great.

 

can u make a vid dude i wana hear that **** i cant find any videos on youtube or street fire

 

I don't have a camera on my phone nor do I have a camera with video making capabilities. Sorry dude.

 

ah shitty

 

2.5" catless downpipe to a cutout.

http://s36.photobucket.com/albums/e3...t=100_2515.flv

It's loud.

 

the vibrant catlesss im buyin is 3inch and 2.5 exit i just wonder how it will sound like urs is really loud

 

probably won't sound like mine. But it will be really loud if you don't have a cat.

 

lol yeah cant wait to get it holy **** u much have alot of mods 2 run 13.2

 

not really. cooling mods, header, dp, cutout, 2.9 pulley, tune.

stock intake.

 

dam nice man i got 2.9 tuned getting vibrant dp got injen few other things i need to get some cooling mods but **** still a very impressive run

 

I'd go with a high flow cat for a couple reasons. One, I see you live in California and the aftermarket cat should flow a lot better than the restrictive stock unit and also add a touch of civility to the car if you go with that setup. Second, you live in California. No cat and a giant exhaust is going to be extremely loud and obnoxious (my opinion) but will probably draw you a lot more attention... to include local law enforcement. If you can avoid that and not sacrifice much power and sound better by using a good high flow cat you should be fine.

Technically the aftermarket, non-CARB-approved cat (and even a CARB approved unit while still under powertrain emissions warranty) is illegal in California but you'd only have to worry about that if you get sent to the ref. For your normal smog inspection, if you have one coming up within the next couple years, the aftermarket high-flow cat should pass the sniffer test just fine and reduce the chance of going to the ref in the first place. If you want to go with a cat-delete, if it were me I'd install a low restriction resonator and/or high flowing muffler just to take the edge off and not be drawing attention to myself every single time I drove the car. I've seen well too often what attention that gets people in this state and others.

 

You should have a resonator and muffler on the car regardless of if you have a cat or not. Those will make much more of a difference to the sound and overall tone of your exhaust than having a cat. Your exhaust WILL be loud and sound like **** without a muffler/resonator.

As for passing the sniffer test - most of the time a high flow cat will fail too. If that's a concern and you don't have a buddy at the shop that can fudge the test for you, I'd get 2 downpipes and just swap come testing time.

Like I said before, it's very possible to have a clean sounding exhaust without a cat (if people still care by Tuesday I can make a walkaround vid)
Normal accel:
http://smg.photobucket.com/albums/v1...t=LowAccel.flv
High speed:
http://smg.photobucket.com/albums/v1...=HighSpeed.flv
Dig:
http://smg.photobucket.com/albums/v1...urrent=Dig.flv

 

i will still car

 

get someone outside your car to take vids. Inside vids don't do anything for sound.

 

much agreed i wanna hear from outside the inside sounded good but it could sound alot diffrent outside of the car do a fly a sitting rev up or a quick pull with someone taping it that would be awsome to see how i sounds threw out the rpms

 

its tuesday

 

I tend to be inside my car when I drive it, so it makes a hell of a difference to me.

Nobody asked for them. I'll try to get them up by Thursday.

 

ive had both cat and catless on my car. first set up was the gm extrude honed manifold, zzp 3inch downpipe with highflow cat, megan exhaust. Sounded great, very...very loud. Now i went to the midlength header from clear image with 1.75inch primaries and the 3inch catless downpipe. The car got even more loud, but less back pressure. im running a 3-2.5inch slip to run the megan exhaust for now. I get compliments on the sound of my car all the time. but especially if your running meth, look forward to shooting flames out your exhaust fast and furious style. lol

 

nice ill keep waiting

 

thursday ;D hehe wating man

 

saturday bro