It's worth so much I would just buy the bypass pipe this way If you need to put it back on you'll have it.

 

 

Where can you buy 2 Porche cat's for $250.00?

 

had mine hollowed out by Russ Kelso of PMCI in NM, i recall him saying it was a RPITA. been on the car about 20 years, no issues

 

 

 

The cat innard is just a spiral wound sheet of ribbed steel that is coated in stainless steel that is held together with a jacket(pipe) of stainless steel. The easiest way was to cut the ends off with a plasma torch, remove the entire assembly and weld the ends back on but at this point the jacket has corroded itself to the main body. So you are left trying to hollow it out. Which is a nightmare because the spiral unwinds as you remove material. I am all for DIY but there are usually dirt cheap bypass pipes on ebay that sell for not much more than what you'll spend in tools/materials and labor.

 

 

correct it was not cut in half, cleaned out then welded back together. i dont recall exactly how it was done but if i wanted one today i'd just buy a bypass, and I dont think Russ would even consider taking on the task today...remember this was done in the 90"s

 

some day I'll learn just to shut up and read what people are saying. They ask you something but they are telling you something else. you want a test pipe I'll give it to you just pay shipping and it bolts right on with the bung for the 02 sensor.