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Old 11-14-2012, 07:18 AM
I'm a DlCK! So what?
Location: Birmingham, AL, USA
Join Date: Sep 2011
Posts: 2,545
Mein Auto: E46 ZHP TS2+ Coupe
I've only seen and experienced the single 3" exhaust. Maybe you can dig around a bit and find some info on a single 2-3/4" exhaust. Back pressure would be ever so slightly higher, but again, the single 3" exhaust has proven to consistently give around 6 WHP gains.

The G-Power supercharger kit can be had for $2,100 from Schmiedmann (link here). That does NOT include an intercooler, an oil cooler, or installation (assuming you're not doing it yourself).
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