It helps a little when you don't have a stock turbo. I would recommend the DEPO DP. Same thing for much cheaper.
Ditto that. [MENTION=2886]FearTheSnail[/MENTION] went 11.9 on a stock catback I think ( maybe it had a cut-out? ).
ATP pretty much NEVER let any info about the car. They just said, "GTX-Xxx turbo". They forgot to mention if it was a gutted car, open dumped exhaust, on race gas, on slicks.
So it's sort of hard to say what ATP had or did not have...
I'll say this... I'm keeping my 3" catless DP, 3" resonator" and 3" piping, but I am going to next it back down right where the stock muffler is to keep it quiet. If I need more power or less back pressure, I'll just do a E-cut out because I'm over exhaust noise... But Oddly, I can live with the 2J race intake after adding sound deadening.
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