targagr

Just got my sport cat x pipe and i have stock mufflers.
Wondering if i need to change my mufflers or not...
Am i restricting now with the better flow of the cats with my stock muffs or will i lose too much back pressure if i install sport mufflers?
What do u guys have?
Not sure if car is running better or worse with the sport cats!

matt777

It all provides restriction but that is not a bad thing. Replacing the mufflers now will only make it louder which may be a problem.

targagr

bump..

chsu74

Droning during certain RPM ranges may also be an issue with a new muffler/ 200 cell CAT combo. I would make sure to take a ride in a car with the same setup before spending the money.

Stealth 993

I have the DACH cat pipe & Fister STG II's on my C4S. No droning at all, & ANY RPM!!

You will not gain any HP with the Mufflers, well, maybe 2-5hp @ the top end, but my car felt like it lost a little down low.

Really it just sounds SWEET with this combo, I love it!

targagr

thanks guys..
yes feel like i lost a little at low end..

CarmG993

I had the DACH X Pipe w/ the 200 cell cats and stock sport mufflers and had no issues while I had that setup.
I did add Fister Stage II's some time after and love the combo.

cohare

I had 200 cell with stock mufflers, it sounded ok but, too quiet. I got the RSR's and it is much better. Great combo and no drone at all. I highly recommend.

RDS928S

I agree, Carmen's car sounds sweet.

I have the x-pipe no cats with Fabspeed Maxflo mufflers.
IMO it is the perfect sound,no drone at all,quite at highway speed and a superb howl above 4k rpm.

Not to mention it's light weight.
Rich

cdmdriver

+ 3 on the 200 cell cats plus Fister stage II's. Awesome sound!

LAT

I have the Cargraphic, (RS Tuning) cats, not sure if they are the 100 cell or 200 cell. With Motorsound mufflers the sound is great. I was told by RS Tuning to expect 5-7 HP no more. The car does rev freer.

targagr

Yes does rev allot freer...would love to have the motorsound mufflers..