XClutch 07-10 BMW 335i Base 3.0L 9in Twin Solid Organic Clutch Kit (8 Bolt/PB in Input Shaft)

The N54 twin-turbo six in the E90-generation 335i responds to a tune, charge pipe and bigger turbos like few engines do, and the factory clutch is usually the first thing to give up. XClutch XKBM23595-2G is a Stage 4 kit built around two 9 inch rigid organic discs, a lightweight alloy pressure plate and a chromoly flywheel, for the six-speed manual 335i with the 8-bolt crankshaft. If your 335i slips in third or fourth once boost comes in, or you are past the point where any single disc will last, this kit is designed for highly modified street cars.

What the 9 inch twin organic clutch does in an N54 335i

Instead of one large disc, the XClutch design splits the load across two 9 inch organic discs with a floating intermediate plate between them. Organic friction engages more progressively than ceramic buttons, so the car stays easy to drive in traffic while the doubled friction area holds far more torque. XClutch rates this kit for vehicles up to 890 ft-lb of torque. The pressure plate is lightweight alloy, the flywheel is chromoly, and the kit includes the flywheel bolts, release bearing, pilot bearing and alignment tool. When the discs wear, it can be rebuilt with XClutch service pack XMS230BM02-2G-XC instead of buying a whole new kit.

Symptoms that point to the clutch

• RPM flare at full boost in the middle gears while the car does not accelerate harder
• Slip that began after a tune, upgraded turbos or a methanol or E85 blend
• Judder pulling away from a stop or reversing up an incline
• A pedal that bites at the very top of its travel as the disc wears out
• Burnt friction smell after spirited driving

How to confirm before you buy

In fourth gear at about 2,000 rpm, go to full throttle; if engine speed rises faster than road speed, the clutch is slipping. A datalog from your tune makes it obvious. Rule out a soft or sticking pedal first, since a failing slave cylinder or clutch delay valve can mimic a worn clutch. Then confirm the crankshaft flange, which is the single most important fitment check for this kit, described below. If your power level is moderate, a single-disc option such as the ACT XT Race sprung six-pad kit or the ACT Mod-Twin 225 street twin disc may be a better fit. Our manual versus automatic repair cost guide covers what clutch labor usually runs.

Fitment

The listing covers the 2007-2010 BMW 335i 3.0L N54 with the six-speed manual, and the part is the 8-bolt crankshaft version. XClutch notes that the N54 used an 8-bolt crank up to roughly December 2008 build dates, with later engines going to 6 bolts. That means most 2007-2008 cars fit, while many 2009-2010 cars will not, so check your crank flange or send us the year and VIN with the build date before ordering. XClutch also designs it for the 8-bolt N54 135i. It does not fit DCT or automatic cars or the later N55 335i. More drivetrain parts are in our rebuild kits department.

Install notes

• Clean all old clutch dust and oil off the back of the engine and dress the crank flange with emery paper before fitting the flywheel.
• Use thread locker on the flywheel bolts and torque them to the BMW specification.
• Lightly grease each disc spline on the input shaft, then fit the discs with the "transmission side" markings facing away from the flywheel and confirm at least 0.5 mm of clearance between the hubs.
• Align with the supplied tool, then bring the 20 M6 pressure plate bolts down evenly, as the XClutch TSB-166 sequence describes.
• Fit the release bearing with its lowest contact face against the clutch fork, per XClutch TSB-214; the bearing can be installed two ways and only one works correctly.
• Bleed the hydraulics with fresh fluid; a Mityvac vacuum bleeder helps. A light intermediate-plate rattle with the pedal pressed is normal.

Will this fit my 2009 or 2010 335i?

Only if your N54 has the 8-bolt crankshaft. XClutch says the 8-bolt crank was used up to about December 2008 build dates, so many 2009-2010 cars have the 6-bolt crank and need a different kit. Send us the VIN and build date to check.

What is included?

Two 9 inch rigid organic discs, the alloy pressure plate, a chromoly flywheel with bolts, the release bearing, pilot bearing and an alignment tool.

How much torque can it handle?

XClutch rates this Stage 4 twin organic kit for vehicles up to 890 ft-lb of torque.

Is it OK for daily driving?

Yes. XClutch positions the organic twin disc for highly modified street cars, and organic friction engages more smoothly than ceramic. Expect some intermediate-plate rattle when the pedal is pressed, which is normal.

Can it be rebuilt?

Yes. XClutch service pack XMS230BM02-2G-XC replaces the friction components.

Does it fit the 335i with the DCT or automatic?

No. It is only for the six-speed manual.

• Automatic vs. Manual Transmission Repair Cost: What to Actually Expect