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Upgraded valve springs recommended (sold separately)
drag racing and/or drag launches can be harsh on the clutch in terms of clutch dumping
The BSR37XZ provides maximum rear roll stiffness with three-position adjustability
The Super Sport Springs offer additional lowering features for enthusiasts who want a lower look and a lower center of gravity for their vehicle
which eliminates the flow restriction that crush-bent exhaust tubing creates
COBB Tuning AccessPORT V3 - 2007-2013 Mazdaspeed3 / 2006-2007 Mazdaspeed6 PDM_brakes-package-deals Upgraded valve springs recommended (soldCobb Accessport V3 2007 2013 Mazdaspeed3 2006 2007 Mazdaspeed6 The Cobb Accessport V3 for the 2007 2013 Mazdaspeed3 and 2006 2007 Mazdaspeed6 brings professional ECU calibration to the MZR DISI 2. 3T direct injection turbocharged platform. OTS maps for 91, 93, and E85, live gauge display, full high speed data logging, and OBD II code management applied to one of the most engaging and tuning responsive front wheel drive turbocharged platforms