How to Install Secondary Cat Bypass Test Pipes. Video Inside

[ProjectM96]

I just made a DIY video for the TS Pro 1 Secondary Cat Bypass Pipes. Same process and directions for Fabspeed and NHP secondary cat bypass pipes. All of them claim 7-8whp and 25 lbs. of weight savings.

I got a mechanic to torch off the 14 melted and rusted bolts for $50, then I drove it home and did the install. Even with the bolts cut off, everything was still stuck together so a hammer was needed to loosen everything.

I did the install in the cold rain because I couldn't wait. It took me just over 1 hour. When I finally test drove the car this morning on my way to work, it was SNOWING. It snowed for 20 minutes, then rained for the rest of my commute so I did not get to test out the acceleration increase yet. But the sound was definitely noticeable.

I just went out to record the exhaust sound in a parking garage to avoid the rain.

Porsche Boxster 986 Test Pipes DIY - YouTube

[Kenny Boxster]

The new sound sounds so beautiful!
Were these the pipes you used?

Porsche 986 Boxster 2.5L 97-99 Performance Catless Pipe Test Pipe Pipes in 50mm | eBay

It says for 97-99 cars but I don't know if it is for 2000+?

[ProjectM96]

Originally Posted by Kenny Boxster

The new sound sounds so beautiful!
Were these the pipes you used?

Porsche 986 Boxster 2.5L 97-99 Performance Catless Pipe Test Pipe Pipes in 50mm | eBay

It says for 97-99 cars but I don't know if it is for 2000+?

Thanks, but no, Same brand, but those pipes are specifically for 2.5L. For 2000+ 2.7 and 3.2 engines, they do Not have those holes for the O2 sensor like the pipes in your link.

For 97-99 Boxsters, I believe it will cause a CEL and won't pass emissions. The exhaust system design is slightly different.

For 2000+
Those O2 sensor holes are not needed and do not cause CEL or emissions problems.

Just keep checking up on ebay for the 2000+ 2.7, 3.2 pipes.