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      11-13-2013, 01:07 PM   #106
Rob@RBTurbo
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Drives: '08 335I AT, '14 M6 DCT
Join Date: Jan 2008
Location: St. Louis, MO

iTrader: (5)

Our selections are based around the options for the BW EFR Twin Scroll Internally wastegated housing in the B2 frames. This limits us to the EFR7064 for 550hp, EFR7670 for 650hp, and the EFR8374 for 750hp.

At some point we may convert over to external gates (for more options), but initially feel that the simplistic nature of the internal gates will help keep the install and component requirements minimal (yet entirely functional). And besides it seems entirely plausible that these options will exhaust the N55's potential in strength as is anyway.

Rob