Has anybody made their own test pipe? What would I need to make a test pipe for a '86 2.8L? What size is the flange side and about how long and what size is the slip side?

 

2.8 test pipe

 

It's a waste of time for 2 horsepower

 

This has nothing to do with HP. The Cat is rotting out at the flange. I don't want to go for $100+ to replace it now... That's why I want to put in a test pipe...

 

You can get a universal cat for $50-60.

 

I would just hack off the flange and find the appropriate pipe diameter to slip it into the pipes... You might get a better response in the V6 section, it's probably a 2 1/4" pipe, but it could be different for V6's.

If you do put a test pipe in there, it's certainly not going to pass an NY inspection in any way shape or form... especially down in the city.

 

I went to the Maremont website and got the info i need...