Thanks to some buddies we had a DIY day and installed these sharkwerk side bypass over the weekend. It was extremely easy and took no more than 3 hours. We took out the rear tires just as another member did here. Only 4 bolts were removed on each side. Quality of the bypass pipes were top notch and perfect fit. More importantly the change in exhaust sound was dramatic. It now has a deep sound that is slightly louder than my Akarp system on the M3. They work perfectly on a non-S. However, I had to replace the tips since non S side muffler exits in the middle. But I know have one exhaust tip on each side that have no pipes connected. These would have gone to the center exhaust on the S model. I may put a coke can in it...

 

Maybe you could rig something in those spots to look like this to discourage tailgaters:

 

Wow, would love to see pics!

 

Sharkwerks, weren't you working on something for us non-S owners? How about a different bend to accommodate our tips?

Nice work Trovan, any clips?

 

Hi..you didn't have any concerns about the air/fuel mixture due to the change in back pressure or voiding the cars warranty? I also have a non s 991 and would like to mod the exhaust. I'm afraid to screw it up. thanks!

 

No I wouldn't... we're not changing the headers/cats and although there is certainly some reduction in back pressure the ECU is going to adjust as always on these cars And since we're not changing the emissions equipments dealerships as normal have been buying/installing it....

Thanks and we're working on something for the standard tips yes. I did get a few start up clips... I'll get those up shortly.

Will post a few later:P

Understood and for sure I know of a good few center exhausts that people have literally thrown out since there's been a lot of upgrades

Haha!

 

thank you Sharkster! great to know I can mod the exhaust and not worry about Porsche Warranty giving me a hard time about it!

 

this thing is loud..... louder but similar to my AMG E63...

 

Loud is good

Any clips yet?

 

Got a couple of videos so far.
Here's the 3.4 starting up and revving a bit:

Did another Carrera S today but the light was so bad... he's going to come back for some more stuff and wants to show it off so we'll get more clips

 

The sound of the car in the first clip (Carrera S) sounds much more aggressive than the second clip (Carrera). Is this mainly due to the Carrera S in the first clip also having a PSE centre or is the 3.4L with Sharkwerks a little more tame in sound than the 3.8 with Sharkwerks?

 

@sharkster, how you did connect the dual tips on each side for the 3.4? The tips looked like OEM for 991S. Did you also have one tip on each side not connected to anything?