Actually a catalyst is designed to convert something without consuming itself (by definition). In the automotive world, it "breaks down" unburnt HCs (hydrocarbons). The downside is that it creates excessive backpressure. But, with most any car produced in the last 10 years or so the power loss at best is negligable.
Their is usually more power to be had by swapping mufflers IMHO.
Tom.
The exhaust is stock 'cept for the MSDS (which helped a LOT) and the mufflers. I still retained the main cat. In case if you guys misread me, I want this to be a hell of a sleeper.
I want a STOCK sounding exhaust. I guess how much would a stock muffler impede the exhasut? Tom? Demon? Anyone?