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Spec Clutch SB104 Stage 4 Performance Clutch Kit

(1987-1991 BMW 325i; 1987-1991 BMW 325is; 1984-1986 BMW 325e; 1982-1986 BMW 528e; 1988-1991 BMW 325iX; 1986 BMW 325es)

Manufacturer

Picture for manufacturer Spec Clutch

Part Number

SB104
9 reviews
Sale Price

$390.24

Estimated ship date Wednesday, November 25

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Spec Clutch SB104 Stage 4 Clutch Kit is a competition-grade clutch system engineered for heavily modified and high-output engines. Designed for motorsport applications where instantaneous engagement and reduced rotating mass are critical, this kit delivers maximum torque transfer at the expense of street-friendly drivability. Not recommended for daily or street use due to its aggressive, on-off engagement characteristics.

Key Features:

  • High-Clamp Pressure Plate: Increased clamping force over stock for superior torque capacity under sustained race conditions
  • Carbon Semi-Metallic Friction Disc: Available in 3, 4, or 6-puck configurations to suit specific racing disciplines and power levels
  • Solid Rigid Hub: Solid 8-rivet hub design, heat-treated for strength and durability — a solid-hub evolution of the Stage 3 design
  • High-Torque Carrier Assembly: Heavy-duty carrier built to withstand the demands of repeated hard launches and high-RPM engagement
  • Complete Kit: Includes pressure plate, friction disc, release bearing, and installation tool kit
  • Rebuildable Design: Clutch components can be rebuilt to minimize long-term consumable costs

Recommended Driving Applications: Drag Racing, Drifting, Road Racing, Rallye, Pulling, Circle Track

The Stage 4 is the most aggressive single-disc option in the SPEC lineup, ideal for dedicated track and race builds where clutch slip is unacceptable and pedal feel takes a back seat to raw performance and longevity under extreme heat.

Products specifications

Fits

1987-1991 BMW 325i; 1987-1991 BMW 325is; 1984-1986 BMW 325e; 1982-1986 BMW 528e; 1988-1991 BMW 325iX; 1986 BMW 325es

Torque Capacity

425 ft/lbs

Excellent pricing and fast and easy checkout! Very quick shipping! Quality product- highly recommended!

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.

GOOD SERVICE, FAST SHIP, CHEAP PRICE

Thought I had an issue with the customer service, and they worked it out PROMPTLY! That's a good customer Service relationship!<br>They even agreed to credit me my shiiping for a slight mistake they made!<br>VERY HAPPY!

This is a great place to get automotive accessories because their prices can't be beat. My packages did come in three different shipments even though I only received one tracking number, but I'm sure I could have got the others if I called. Overall great experience. Thanks.

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.

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