I installed a modified stock muffler for my 02 996. This is a popular cheap PSE mod. Thanks to OrientExpress at Rennlist for donating his stock muffler so I don't have any downtime.

I used 2.25 pipe. I was surprised how quiet it was compared to stock. Not much change in sound below 3k rpm. Above 3k, the noise is a little more obvious, maybe 15-20% louder and slightly more transparent.

Honestly, I was a little disappointed at the result. Even though I didn't pay much $100 and 2 hrs of my time for install, I would not have bothered since I was happy with stock. If anyone is thinking of upgrading, I'd opt for real PSE or go with a nice aftermarket. Just my opinion.

 

Are you sure that it was done right?

My 03 mufflers sound much louder and deeper after the mod at idle and above.

 

Not sure where it could have gone wrong. Shop did the welding and new pipe. Their weld looks good and they've done it before so they should be competent. The only thing I could think of is if they didn't make the cutouts big enough. That would be hard to believe but I suppose it's possible.

 

Quieter than stock? That's new. Mine is louder all around, especially if you get on the throttle.

 

No one said the modified PSE is quieter than stock. U sure ur on earth (see location)






JK pal!!

 

What pipe sizes are you guys using?

 

Yes, I'm in Earth!!