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Spec Clutch SB304 Stage 4 Performance Clutch Kit

(1996-1999 BMW 328i; 1997-1998 BMW Z3 Roadster; 1997-1998 BMW 528i; 1996-1999 BMW 328is)

Manufacturer

Picture for manufacturer Spec Clutch

Part Number

SB304
8 reviews
Sale Price

$394.02

Estimated ship date Wednesday, November 25

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Fitment guaranteed

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Product Details

The SPEC SB304 Stage 4 Clutch Kit is engineered for heavily modified, high-output engines where maximum torque capacity, instantaneous engagement, and reduced rotating mass are top priorities. This is a full-competition clutch kit intended for dedicated race and motorsport use — not recommended for street driving due to its aggressive, near-instant engagement characteristics.

Key Features:

  • Solid Hub Design: Upgraded from the Stage 3 with a solid 8-rivet hub configuration, heat-treated for enhanced strength and long-term durability under extreme conditions
  • High Clamp Pressure Plate: Delivers significantly increased clamping force over stock for maximum torque transfer without slippage
  • Carbon Semi-Metallic Friction Disc: Available in 3-puck, 4-puck, or 6-puck configurations to match your specific power level and driving discipline
  • Complete Kit: Includes high clamp pressure plate, friction disc with rigid hub and carrier assembly, release bearing, and installation tool kit
  • Race-Proven Construction: Designed, hand-built, and tested in the U.S.A.

Intended Applications: Drag racing, drifting, road racing, rallye, pulling, and circle track competition.

The SPEC Stage 4 is the choice for competitors who demand the ultimate in clutch holding power and aggressive engagement response. Due to the harsh engagement characteristics inherent in the Stage 4 design, this clutch kit is not suitable for street or daily driving use.

Products specifications

Fits

1996-1999 BMW 328i; 1997-1998 BMW Z3 Roadster; 1997-1998 BMW 528i; 1996-1999 BMW 328is

Torque Capacity

517 ft/lbs

Quick, Fast, Easy. Item I wanted was right there!

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

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.

Easy to do business with BEST PRICE anywhere!! Shipped and arrived quickly

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.

I was trying to locate a hi volocity radiator fan and for it at Autoplicity at a very good price. The item was shipped fairly quickly concidering it most likely had to come from the manufacturer. Thanks for your help.

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