ACT 2007 BMW 135/335/535/435/Z4 HD/Perf Street Sprung Clutch Kit
ACT BM14-HDSS is the street-friendly clutch upgrade for manual BMWs with the 3.0L turbo N54 or N55: the 135i, 335i, 535i, 435i and Z4 sDrive35i. It suits the driver whose car has a tune or bolt-ons and a factory clutch that now slips when boost peaks, but who still commutes in it every day and wants smooth, predictable engagement. Our listing is titled for 2007 cars, the first year of the E90/E92 335i.
This kit combines ACT's Heavy Duty pressure plate with its Performance Street sprung organic disc. ACT rates it at 465 ft-lb at the crank, 52 percent over the factory clutch, which covers most lightly tuned cars. The disc is 240 mm (9.4 in) on a 1.375 in input spline, with a copper-rich organic lining for heat transfer, a steel-backed lining for burst strength and reduced marcel for quicker shifts. ACT describes the feel as light to moderate pedal effort with smooth, positive engagement, and estimates a Heavy Duty plate adds 15 to 40 percent pedal effort over stock.
Per ACT, the kit contains the B015 Heavy Duty pressure plate, the 3000812 Performance Street sprung disc, the RB015 release bearing and two alignment tools (AT105 and AT118), plus M8-1.25 x 20 mm pressure plate bolts. ACT lists the kit at 15.9 lb.
Rule out the hydraulics first. A soft pedal, a pedal that is slow to return or grinding into gear points to the slave, master or clutch delay valve, not the disc. For slip, use fourth gear from about 2,500 rpm at full throttle and log rpm and speed with a scan tool; a clutch that slips shows rpm climbing faster than speed. Our slipping diagnosis guide covers the method, and flare vs. slip helps if you are not sure what you feel. Check the bellhousing for engine oil, which will ruin a fresh organic disc.
ACT lists BM14-HDSS for the manual 2008-2013 135i (E82/E88), 2007-2013 335i and xDrive (E90/E92/E93), 2011-2013 335is, 2012-2015 335i F30, 2014-2016 435i F32, 2008-2010 535i E60/E61, 2011-2016 535i F10 and 2009-2016 Z4 sDrive35i. ACT splits the early N54 cars at January and February 2009, which affects the flywheel, so send us your build date or VIN and we will confirm. More clutch parts are in our rebuild kits category.
If the car makes more power or sees launches, the ceramic six-pad BM14-HDG6 holds 596 ft-lb.
| Brand | ACT |
| Part number | BM14-HDSS |
| Fits | ACT 2007 BMW 135/335/535/435/Z4 HD/Perf Street Sprung Clutch Kit |
| Vehicle fitment | BMW 135/335/535/435/Z4 Hd/Perf (2007) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
ACT lists manual 2008-2013 135i, 2007-2013 335i/xDrive E90/E92/E93, 2011-2013 335is, 2012-2015 335i F30, 2014-2016 435i F32, 2008-2010 535i E60/E61, 2011-2016 535i F10 and 2009-2016 Z4 sDrive35i with N54 or N55 engines.
ACT rates it at 465 ft-lb at the crank, 52 percent over the factory clutch. For more, the ceramic BM14-HDG6 is rated at 596 ft-lb.
No. ACT states the kit must be used with an ACT flywheel, sold separately, such as 601030 or the 601180 Streetlite for 2007-2009 N54 cars.
ACT describes light to moderate pedal effort and says Heavy Duty plates typically add 15 to 40 percent over stock, with smooth engagement suited to daily driving.
Yes. ACT recommends 300 to 500 miles of mild driving on organic street discs before spirited driving or launches.
