lburou, thanks for the information. Those are both informative sites. I have been a Turbo Regal Owner for the last 10 years. I have many parts and upgrades available to me for the TTA. I have the fuel pressure reg., the bigger fuel pump, the hot wire kit, the alky injection, bigger injectors, scan tool, bigger turbo, Turbotweak chip, drag slicks, electric exhaust cutout, and so forth. Maybe I should just start putting the parts on and buy upgrades when I am unable to go any further with what I have. But it seems to me that the downpipe and exhaust in its stock form is very restrictive. Thanks again for the information.
James Armbrust