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Spec Clutch SB664 Stage 4 Performance Clutch Kit - Carbon Semi-Metallic Puck Disc

(2001-2006 BMW M3; 2007-2008 BMW Z4 M Coupe/M Roadster)

Manufacturer

Picture for manufacturer Spec Clutch

Part Number

SB664
13 reviews
Sale Price

$582.91

Estimated ship date Friday, November 20

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Fitment guaranteed

Fitment guaranteed

Product Details

The Spec Clutch SB664 Stage 4 Clutch Kit is a high-performance, competition-grade clutch system engineered for heavily modified engines demanding maximum torque capacity and rapid engagement. Built as a solid-hub evolution of the Stage 3, the SB664 delivers the aggressive performance characteristics required for motorsport applications.

At the heart of this kit is a solid 8-rivet hub with a heat-treated disc assembly for enhanced strength and long-term durability. The high-clamp pressure plate works in conjunction with carbon semi-metallic friction material to deliver superior torque holding capability and resistance to heat fade under race conditions.

Available Puck Configurations:

  • 3-Puck: Lightest option — ideal for applications where rotational mass reduction is the priority
  • 4-Puck: Balanced compromise between weight savings and engagement smoothness
  • 6-Puck: Smoothest engagement of the three options; street-drivable but not street-friendly due to the rigid hub design

Kit Includes:

  • High-clamp performance pressure plate
  • Carbon semi-metallic puck disc (3, 4, or 6-puck — configuration varies by application)
  • High-torque solid rigid hub and carrier assembly
  • Release bearing
  • Installation tool kit

Recommended Driving Disciplines:

  • Drag Racing
  • Drift
  • Road Racing
  • Rallye
  • Pulling
  • Circle Track

Important Note: Due to the rigid hub design, this clutch kit is not recommended for street use except in the 6-puck configuration, and even then engagement characteristics remain harsh compared to stock or street-oriented clutches. A proper break-in period is required before full-throttle use.

Products specifications

Fits

2001-2006 BMW M3; 2007-2008 BMW Z4 M Coupe/M Roadster

Torque Capacity

580 ft/lbs

great service!

Could not tell how much was charged for shipping

Good tools at a good price. Got exactly what I order fairly fast!

Grate you had what was looking for

thanks

.

Simple, no issues

I got the part I ordered and will be having someone install it soon looks just fine and I love the chat feature as well.. thinking about buying brake shoes now.. a lot of savings

good

Great prices & fast shipping.

They had the best price anywhere on the items I ordered(Recon Lights). Prompt emails and accurate tracking via UPS shipping. I'm pleased and will order more items now that I know they're "legit". Thanks Autoplicity!<br><br>Nick C.

I ordered this product and Wednesday in the morning and it was on my door step Thursday morning with regular shipping. The ordering process was super easy and the price was $35 cheaper than any other online retailer. The Rack is awesome, easy to assemble took me about 20 minutes by myself, put on my jeep hooked up the bikes and off I went, fantastic design, I highly recommend the Rola NV2 bike rack and highly recommend Autoplicity

Not sure if they overlooked my order but I didn't get my shipping info (3 days after ordered) until I emailed asking for status update. I received a response the following day and all my items ordered came 2 days later...much faster than I had anticipated considering the "delay" or lack thereof (5 days total). Long story short...items are as described, best prices (from what I can researched online for same items/brand) and resonable shipping prices. the selection and brand(s) offered were somewhat limited for my specific needs, otherwise I would've ordered more.

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