if i can't get the bypass pipes directly in Canada at Pfaff or someone similar, i'll book them through vivid - i love those

 

The parts are modular so will work with the PSE system fine. It would DEFINITELY pass DB levels for a track. We have a decible meter somewhere here. When the car comes back this week, I can try to get a rev reading.

 

Ordered bypass + headers!
Very appreciative of the transparency on performance data. Other exhausts have been promoted for weeks on the forum with nothing else than video clips and no facts...
Good job Vivid and Agency Power

 

Thank you. I think you ordered from Josh? If you have an questions, just shoot me a PM or him an email.

 

Yes, Freed Performance will do the install and ordered from Josh.
Looking forward to the sound and extra torque/hp

 

991 is back in the building! We are going to be finishing the design of the center muffler to go with the rest of our modular parts. This will be an XPipe design. After the X design kit, we will also be doing a valvetronic setup for those that want LOUD! In addition, we also have the factory sport exhaust here which features its own X design. So we are going to do a dyno test to compare how that exhaust performs compare to the other stock box style system.

While the exhaust is being welded up, we started to dive into our intake project. Rather then reuse other parts, we are going to develop a complete functional true cold air product that will retain the factory decklid air scoops. So here are some photos of what the car looks like with out the intake and the space you really have to work with!







While we have the car here we did decide to do factory wheels in gloss black and a 20% tint for him. We are also adding the H&R springs so stay tuned for more updates and picture pics!

 

Love the work you guys are doing. Especially with the side muffler delete pipes. It saves weight and gives you better sound. For about a grand, this is a WAY BETTER DEAL than PSE! Thumbs up guys!

 

Wrapping up the 3rd piece to our modular exhaust system for the 991 Carrera is the main center muffler. We chose to do a X-Pipe style as having worked with previous X-Pipe designs, this really makes for a great sound and good power. The factory muffler has a small pipe that comes out of the muffler box when you use the Sport PSE function. This pipe basically floats behind the exhaust tip. We incorporated this small design element into ours. We should be doing dyno and video testing this week.

Stay tuned!

 

WOW!!! The first 991 X pipe that I've seen! Quick question, can the sports headers/cats be installled without removing the rear bumper if you plan to keep using the side mufflers? Like you don't plan to touch them. Thanks.

 

You can remove the headers without removing the bumper. The side mufflers not sure, will ask my guy.

 

How about long term testing on those header/cats? Like on the street, and on the track for say several months. Is this something that will be tested as such?

 

Its on the customers car, so as long as he keeps truckin, we keep updating

 

put that X pipe on the market ! us 991 guys want one!

 

Continuing on our path of Performance Modularity for the Porsche 991 Carrera, we just finished up testing of our new center muffler X-Pipe exhaust. Like our headers and 2nd Muffler Bypass Pipes, this exhaust also fits with the stock parts. The factory center muffler has a 3rd chamber that opens up when you press the sport button and pushes exhaust gas, by passing the muffler. With the Agency Power center muffler, we incorporate a separate exhaust pipe that comes off near the X design and exits the floating tip. We tested the center pipe in conjunction with each stock part to hear the difference in sound and see the change in power.

The first test was with the stock parts and the center X-Pipe exhaust. The baseline of the car has a very waivy ride through the RPM band. Whether conducted in sport or regular mode, this did not change. So we chose to run our tests in sport mode. From 3000rpm to 6400rpm the car made consistant power. From 3800-4200rpm the car made about 50hp and 80ft/lbs of torque! The rest of the curve yielded about a 20hp gain until it ran out of steam near redline. In regards to the sound, the XPipe alone made for a really crisp tone that could be tolerated and enjoyable for daily driving and wanting to get a more sportier feeling of the car. In addition to the great sound and power, the rear XPipe also saves about 20lbs off the rear end of the car.






Our next test was with the 2nd muffler bypass pipes and the center Xpipe. Having already tested the 2nd pipes, we new that audibly, they only slighly changed the tone of the stock car. Paired with the x-pipe on the 991, this gave a slight increase to the exhausts pitch making it higher. Overall, this combination really only affected sound and weight as the power increases were the same.






The final test was all 3 components together: Headers with cats, 2nd muffler bypass pipes, and center X-Pipe. When we tested the headers alone against the stock car, you could see how the special merge collector smoothed out the power curve all together. All the waiviness that the 991 Carrera would experience through the RPM was gone. With the collective efforts of all 3 parts, a smooth horsepower and torque graph became a reality. With a near 90ft/lbs of torque gain in the low end and a average gain of 40-50hp throughout the curve, this setup was definitely impressive. With power comes noise, and only those who want a exotic sound that makes heads turn should run this setup. As you go through the gears, the car unleashes a menacing roar as if you were watching a GT Porsche Cup race.







Enjoy the pics and videos!

 

OH MY GOD... I'm in loveeeee!!!!
Man that's just sounds awesome!!!!

OK I know this is not for the 991 wide-body variants but I'm really hoping you guys will have this package when the C4S comes out...
I was going to get the stock PSE and add 200 cell cats/headers but after hearing this... I absolutely HAVE to have this set up (full package)!

Please tell me you're going to do some drive-off clips!!!!.
It'll make the wait for my C4S 991 a little more bearable.

Please PM me the price for this X pipe setup.

You guys are AWESOME!