Just took my greddy exhaust off and put the stocker back on. Now I found out I have an exhaust leak in my flex pipe (Excuse to go aftermarket Y!). So i was just wondering if there are any downsides to doing this with my hotshot headers and stock catback. Is it gonna sound like crap? Any input is appreciated.

 

No. Most likely you won't have much sound. Stock system does a great job at keeping things quite and robbing hp.

 

So you have hotshot headers laying around? Or are you planning on buying hotshot headers? It wont be the best sound but yeah it will work. I have cattman headers with stock cat back and it's not bad.

 

^^ what he said.
I'm runnin cattman system on stock catback and it's pretty quiet
Definitely next thing is a 3" catback though.

 

If you don't want your Greddy exhaust anymore, you can give it to me. I'll pay shipping.

 

it's not loud at all. i have intake/headers/y-pipe/test pipe with a stock cat-back.

 

I agree with the above comments. It's great if you like a quiet ride like I do. The headers, Y pipe, and stock cat-back combo is barely louder than stock. I still put down 235 WHP on the dyno.

 

I had that setup for like a month till I threw back on the 3'', it was quiet and still had power, should be good doesnt sound bad at all...

 

I ran gutted pres and a cattman y with a stock cat back and main cat

 

I had this set-up for years and years, netted me 233 in my AT with only intake and headers, nothing else.

The stock cat back can support up to 250fwhp on a Dynojet, so, that's pretty impressive IMO.

 

You may as well only put the stock axle back on. The stock b pipe is horrible where it is crimped to half of the pipe diameter right after the resonator. If you want the power and low noise then get the g35 sedan muffler. It has 2.5" inlet and will be very quiet.

 

I ran headers with no cat back for about 3-4 months. It sounds much better than stock(a little more throaty and robust) and the power gains are obvious.

I don't think you'll hurt anything, but the catback will free up an extra 5-15 HP(approx) depending on 2.5" or 3"(and tune) so expect a minor power loss.

 

I was under the impression that replacing everything except the OEM muffler will still keep things quiet. Not so?

DW

 

More quiet than a straight through muffler design. But, the more you take away from the stock cat-back the louder it will get.

 

thanks for the replies. I do miss the power gains of the greddy. I just hated the drone. Might end up just throwing that back on and welding in a big resonator

 

So I'm slightly lost.....Are you currently running a Header assy or Ypipe?
I ran my Cattman headers with a HFC, Cattman 2.5" Bpipe and stock rear muffler and loved it....Kinda had a throaty mustang V8 sound and would gurgle and burble on throttle lift....Loved it and it was quiet as hell during all aspects of travel....

 

You ran open headers and all you got was a little more throaty and robust?

Or did I miss something?

Depends on what your definition of quiet is.

I loved the sound of headers, the OEM cat, Cattman B-pipe and stock muffler.

 

I'm running headers, gutted cat, stock b pipe and cattman 2.5" muffler. It sounds awesome. I get compliments all the time about it. I know there is a ton of power left on the table that can be had from swapping out the stock b pipe. But as of right now, I'm not power hungry enough to warrant changing right now.

I have a clip but it was when I had a nasty intake manifold leak and exhaust leaks galore.

 

I currently have on hotshot headers, stock y, stock catback. I found out I have an exhaust leak in my flex pipe. I want to switch out the whole y pipe but wanted to know of any consequences or if it was gonna sound like **** with the stock catback. I do have a greddy catback sitting in my garage that I am debating on selling or welding in a resonator and putting it back on

 

That's interesting. How the hell did they accomplish that? Probably needed some modification to the stock y at the very least.

 

So your headers look like these...



I'm assuming he has the eBay short headers...

 

Cattman headers and y, stock cat, res delete with stock muffler is a little raspy through 1500 to 2000 rpms then sounds awesome. Still waiting on the cattman 3"

 

I was assuming the same thing for now.

 

someone fill me in.. lol. Just bought the car a couple weeks ago. Thats what the craigslist ad said... hotshot headers, greddy catback with test pipe

 

Pictures of said stock y-pipe would help.