The ACT XACT Flywheel Streetlite is a one-piece forged flywheel built for street and race duty, delivering noticeably improved engine response and acceleration with OE-to-mild gear rattle. The forging is heat-treated for strength and toughness, and the ring gear is induction-hardened for maximum service life. One-piece construction eliminates the failure points found in multi-piece flywheels and provides uniform, efficient heat transfer away from the clutch disc, so there are no warped inserts or loose ring gears to deal with. Each flywheel is forged, CNC-machined, and dynamically computer-balanced for smooth, reliable operation at high RPM.
Warranty
Installation Instructions
Backed by ACT's one-year "Excellence in Performance" warranty.
Specifications
- Product Type: XACT Flywheel Streetlite
- Weight: 16.5 lbs (approx. 25% lighter than stock)
- Construction: One-piece forged, CNC-machined, dynamically computer-balanced
- Ring Gear: Induction-hardened for extended service life
- Hardware: Flywheel bolts included (M12-1.5 x 25mm)
- Recommended Use: Street and race
- Gear Rattle: OE to mild
- Part Number: 601170
Vehicle Applications
- 2008 BMW 128i
- 2009 BMW 128i
- 2010 BMW 128i
- 2011 BMW 128i
- 2012 BMW 128i
- 2013 BMW 128i
- 2006 BMW 325i
- 2006 BMW 325xi
- 2007 BMW 328i
- 2008 BMW 328i
- 2009 BMW 328i
- 2010 BMW 328i
- 2011 BMW 328i
- 2012 BMW 328i
- 2013 BMW 328i
- 2009 BMW 328i xDrive
- 2010 BMW 328i xDrive
- 2011 BMW 328i xDrive
- 2012 BMW 328i xDrive
- 2013 BMW 328i xDrive
- 2007 BMW 328xi
- 2008 BMW 328xi
- 2006 BMW 330i
- 2006 BMW 330xi
- 2006 BMW 525i
- 2007 BMW 525i
- 2006 BMW 525xi
- 2007 BMW 525xi
- 2008 BMW 528i
- 2009 BMW 528i
- 2010 BMW 528i
- 2008 BMW 528xi
- 2006 BMW 530i
- 2007 BMW 530i
- 2006 BMW 530xi
- 2007 BMW 530xi
- 2007 BMW X3 3.0si
- 2008 BMW X3 3.0si
- 2009 BMW Z4 sDrive30i
- 2010 BMW Z4 sDrive30i
- 2011 BMW Z4 sDrive30i
Frequently Asked Questions
What does the ACT 601170 flywheel fit?
The 601170 fits the 2008-2013 BMW 128i (E82/E88) with the N51/N52 L6-3.0L engine, plus a range of other N51/N52-powered 3-series, 5-series, X3, and Z4 models sharing the same clutch spline. See the full Vehicle Applications list above to confirm your specific year and trim.
Why does one flywheel part number cover so many different BMW models?
BMW shared the same manual transmission clutch spline across these N51/N52-powered 1, 3, 5, X3, and Z4 models, so ACT engineers a single flywheel part number for the shared spec.
Does the 601170 flywheel include mounting hardware?
Yes. The 601170 ships with flywheel bolts (M12-1.5 x 25mm) included.
What warranty comes with the ACT 601170?
ACT backs the 601170 flywheel with a one-year warranty.