Some time ago I read a rather long posting detailing what you can do to get optimal performance out of a 22RE. It was quite informative. Unfortunately, I didn't bookmark it. It said that for optimal economy/power, put 2" pipe from the manifold (not headers) to the catalytic converter and 2 1/4+" pipe from there back.

My 22RE has 2 1/4" Jardine catback, but has stock down pipe. I'd like to take that to 2" but have only been able to find the Bosal downpipe (even local Toy dealer is selling the Bosal). Anyone know where to get a 2" downpipe from stock exhaust manifold to catalytic converter?

Also, anyone remember the above mentioned informative post? Was it here or in another forum? I thought it was here, but all of my searching has turned up nothing.