This is a DIY video for the secondary cat bypass pipes for the 1st generation 1997-2004 Porsche Boxster. The particular brand in this video is TopSpeed Auto….
This is a DIY video for the secondary cat bypass pipes for the 1st generation 1997-2004 Porsche Boxster. The particular brand in this video is TopSpeed Auto….
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Its real name is test pipe. It is supposed to “test” if a catalytic converter is clogged or not. It was invented for emissions testing. However, car enthusiasts use them for other purposes: power and sound. So Test Pipe is the correct term, Bypass pipes or decat pipe is slang for test pipe.
Why the hell do you call it a test pipe??! It’s a pipe deleting the cat so is called a decat pipe, fucking stupid Americans!
Thanks. Easy to understand.
Cat-back exhaust sound is in one of my other videos. It sounds loud in tunnels and screams like a GT3 or Ferrari. I love it.
Yeah. I love it. It sounds stock at normal or constant speed driving. It sounds amazing when I step on the gas to accelerate. No vibrations or drone. I also added a cat-back exhaust a couple of weeks after the test pipes.
No. Because they are the secondary cats. They will cause the light to come on only in 1996-1999 Boxster’s. The 2000+ Boxsters were designed differently with 4 cats. The primary cats are on the headers and they are required to stay legal and pass emissions and inspection. The Secondary cats can be removed with no problems on 2000+ Boxsters.
Did you get the EML lamp come on when removing the cats?
They say 7-8whp increase. It is hard to tell in reality since 7-8whp is not much. But my speedometer seems like it is showing quicker acceleration. haha.
Sounds good. Hows the performance increase?