cat delete on stock muffler
#2
Yeah it will drone terribly and you'll still have to get a custom tune to prevent a CEL without the benefit of increased flow an aftermarket exhaust provides.
Not worth it. Spend the extra for a decent new exhaust.
Not worth it. Spend the extra for a decent new exhaust.
#3
Shifter is correct about the tune, with catbypass pipes you will throw a CEL for cat efficiency. As far as the drone, you'll get some but the stock muffler is pretty restrictive so it would cut it down some.
Depending on what the car gets used for I would highly recommend our Supersport X-Pipe with Cats. Our X-Pipe makes +25 hp and +31 ft/lbs in addition to the improved exhaust tone!
Let me know if this is something you'd be interested in or if you have any questions. I'm happy to assist!
Supersport X-Pipe - Product Linke
Depending on what the car gets used for I would highly recommend our Supersport X-Pipe with Cats. Our X-Pipe makes +25 hp and +31 ft/lbs in addition to the improved exhaust tone!
Let me know if this is something you'd be interested in or if you have any questions. I'm happy to assist!
Supersport X-Pipe - Product Linke
#4
Stock muffler isn’t restrictive at all. I’ve tested them all and it’s the best flowing turbo muffler Porsche has build so far. Sounds much louder without cats but the same tone remains. FYI the 991 TT stock cats are actually 997.2 TT cats.
#5
PS Have you done test on headers?
#7
+2. Increased sound and restriction delete. WIN WIN
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#8
Here is a dyno chart with the results of a stock car that has cats vs. the same stock car with the cat bypass pipes that we make. The dotted line is the stock run.
You will notice that the car gets up on power a lot quicker with the cat-bypass and makes more power. The car also runs leaner with the cat bypass which can easily be corrected with a tune. With the correct tune it is a great low cost upgrade for those customers that race their cars.
Feel free to PM me for special pricing on these.
These cat bypass pipes are for off-road use only.
You will notice that the car gets up on power a lot quicker with the cat-bypass and makes more power. The car also runs leaner with the cat bypass which can easily be corrected with a tune. With the correct tune it is a great low cost upgrade for those customers that race their cars.
Feel free to PM me for special pricing on these.
These cat bypass pipes are for off-road use only.
#11
Probably the worst info and advice I've ever read.
#12
Ready for the perfect welding job
I am testing following / remove the second cat / System is OBD complaint with the pre cat in front /half restriction/
Hope next month i am ready to see results (i use cheap used cats from a 997.2 DFI Engine....)
Last edited by winnigt2; 07-22-2019 at 02:32 PM.
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HRE_Jurrian
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09-07-2016 11:29 AM