If you're looking to upgrade your ride, the ACT Advanced Clutch XT/Perf Street Rigid Kit (BM14-XTSD) is a solid choice. This kit is built for those who really push their cars, featuring an Xtreme pressure plate that’s designed to handle the toughest driving conditions. The unique diaphragm design increases clamp load, which means you get better engagement and less deflection—this translates to a longer clutch life. Plus, every diaphragm goes through a four-stage heat-treating process, so you know it’s made to last.

What’s cool about the pressure plates is their precision cover stampings. This isn’t just for show; it adds rigidity and consistency, making your shifts feel smooth and reliable. The performance street rigid-hub discs are made with premium organic materials that have a high copper content, which helps with heat transfer. This means you can push your car harder without worrying about overheating. The steel-backed lining adds even more durability, so you can trust that this kit won’t let you down when you need it most.

One of the standout features is the chrome-moly hub, which is heat-treated for added strength. The rivets used in the design are carefully selected to maximize strength, ensuring that everything holds up under pressure. And if you're all about quick shifts, you'll appreciate that these discs are the lightest street discs available, which means faster engagement when you’re racing through the gears.

Now, let’s talk about the pedal feel. Expect moderate to heavy effort, but the engagement is smooth and positive. Just a heads up—this setup might increase gear rattle a bit, but that’s all part of the performance game. Thanks to ACT's diaphragm design, you’ll get a longer clutch life, although the rigid design could lead to increased spline wear, so keep an eye on that.

This kit is perfect for both street and race use, and it’s been 100% clamp load tested and dynamically balanced for reliability at high RPMs. It’s a great choice if you want race-proven performance without sacrificing drivability.

Installation Notes:

• For installation instructions, CLICK HERE.

Specifications:

• Clutch Disc Diameter: 9.4 in (240 mm)
• Input Spline Quantity: 26
• Input Shaft Diameter: 1.375 in
• Torque Capacity: 549 ft/lbs
• Product Weight: 14.9 lbs
• Pressure Plate Type: Xtreme
• Disc Material: Organic

What’s Included:

• Release Bearing: Yes
• Grease: Yes
• Alignment Tool: Yes
• Pressure Plate Bolts: Yes (M8-1.25 x 20mm)

Compatibility:

• BMW 135i (2008-2013)
• BMW 335i (2007-2015)
• BMW 335is (2011-2013)
• BMW 335xi (2007-2008)
• BMW 435i (2014-2016)
• BMW 535i (2008-2014)
• BMW 535xi (2008)
• BMW Z4 (2009-2016)

Overall, if you're serious about performance and want something that can handle the heat—literally and figuratively—this clutch kit is definitely worth considering. It strikes a great balance between street usability and race-ready performance.