Testing The Waters

[pwpanas]

Originally Posted by 792

I have another question for you.

If I'm upgrading to a 3" downpipe and catback exhaust for bpu+++ but I plan to go to APU later on, would a 4" catback exhaust and downpipe be better at APU levels? if so, would I be able to skip the 3" downpipe and exhaust and go right to the 4" at bpu/bpu+++ so I don't have to buy two exhausts and two downpipes?

The Mkiv Supra TT exhaust comes in three sections: A downpipe, a midpipe, and a 'catback exhaust'. The only one part of those three that needs to be changed if you go to an aftermarket turbo setup is the downpipe. The midpipe and the catback exhaust *can* still continue to fit whether you have the oem twin turbos or an aftermarket turbo. The oem midpipe has a cat. There are several options for either 3" or 4" or even 5" aftermarket midpipes (without cat). There are many, many options for 'catback exhausts'. In other words, the same exhaust (and midpipe) will work with both setups. You will need to change the downpipe when you upgrade from the oem twin turbos to an aftermarket turbo setup.