Where can I get a 4" down pipe for a first gen with an HX35?

 

Rip Rook makes a 4" exhaust for the 1st gens. that people speak pretty highly off. He sells a 4" downpipe but it requires some fabrication to get it to mate up with the turbine housing. Here's the exhaust: Rip Rook 4" and here's the downpip: Rip Rook 4" downpipe .

 

I've got his downpipe, haven't installed it yet, I am hoping to make it adjustible for either a wastegated housing or non.

Also, having an hx35 doesn't make any difference, its what exhaust housing you have, if you have a wastegated housing it will be very very very tight to make the turn before the firewall as it is tight enough without a wastegated housing.