You can use the stock converter for a down pipe or get a custom made one. I had been running an old Starion converter that had long ago lost its guts.

I found a source for a 16 gauge 304 ss mandrel bend for $30 with a 80? angle that fits pretty well. I also bought a couple of 1/2" thick flanges from Roadrace engineering and a SS flex pipe on E bay for $20. I used the factory turbo flange but ported it.

Parts source

By using the factory turbo flange i can run the pulse air system (SAS) for emmisions and it mounts the o2 sensor. I used 308 filler wire and a tri mix gas on my mig for the SS welds. Getting good looking welds was a challenge. Stainless does not weld as easily as mild steel.

The starion converter will get you on the road but the custom down pipe gets you a faster spoolup and more hp. It also saves 4 lbs and the access to the flange bolts is a lot better than with the starion part.

I turned the flanges in the lath to make a thinner section to weld to. I machined the other sides of the flanges in a lathe and they are flat enough that I dont need a gasket to get a good seal.




Image of the stock housing after porting.

The pipe bend is an 80? angle. Roadrace says its a 72? angle but dont believe them. Either way it fits better than
a 90? bend.

Kevin C