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Spec Clutch SB055 Stage 5 Performance Clutch Kit - Full-Metallic Sintered Iron Disc

(1996-1999 BMW 328i; 1996-1999 BMW M3; 1997-1998 BMW Z3 Roadster; 1999-2001 BMW Z3 M Coupe/M Roadster; 1989-1995 BMW 525i; 1996-1999 BMW 328is + 2 more models)

Manufacturer

Picture for manufacturer Spec Clutch

Part Number

SB055
4 reviews
Sale Price

$620.69

Estimated ship date Friday, November 27

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Product Details

The SPEC SB055 Stage 5 Clutch Kit is SPEC's highest-rated single-disc clutch solution, engineered for heavily modified race engines and extreme performance applications. Built around a full-metallic sintered iron disc with the highest available friction coefficient, this kit delivers maximum clamping force and torque capacity where ordinary clutches simply cannot survive. It is also well-suited for applications requiring slipper clutch or progressive torque-induced engagement behavior.

The Stage 5 disc assembly features a solid 12-rivet hub that is heat-treated for exceptional strength and durability under sustained high-load conditions. A high-clamp pressure plate (with adjustability available on select applications) ensures consistent, firm engagement at all power levels. The 9.5-inch disc diameter and 10-spline, 1.125-inch input shaft are sized for performance drivetrain demands.

Kit Includes:

  • High-clamp performance pressure plate
  • Full-metallic sintered iron friction disc — solid, unsprung hub
  • Release bearing
  • Installation tool kit
  • Race bolt kit and flange plate

Key Features:

  • Full-metallic friction material with maximum friction coefficient
  • Solid 12-rivet heat-treated hub and disc assembly for strength and durability
  • High-clamp pressure plate — adjustability available on select fitments
  • 9.500-inch disc diameter
  • 10-spline, 1.125-inch input shaft diameter
  • SFI Approved
  • Made in the USA

Recommended Applications: Drag racing, tractor/truck pulling, and autocross. Stages 4 and 5 are race-only configurations. Note: This clutch is street-drivable but not street-friendly due to harsh engagement characteristics. A compatible SPEC flywheel is required to complete the upgrade and is sold separately.

Products specifications

Fits

1996-1999 BMW 328i; 1996-1999 BMW M3; 1997-1998 BMW Z3 Roadster; 1999-2001 BMW Z3 M Coupe/M Roadster; 1989-1995 BMW 525i; 1996-1999 BMW 328is; 1998-1999 BMW 323is; 1993-1995 BMW 525iT

Torque Capacity

555 ft/lbs

Prices were very fair, had to check back a few times to the listing to determine if item was sold in pairs and/or individually. Overall however the product looks good.

After searching for the best prices for the product that I wanted, I ended up with Autoplicity. I quickly got a response that my product has just been shipped and I am very impressed that Autoplicity is giving me an incentive to write a review on them. This tells me that this company is very concerned with the satisfaction of their customers. I am currently waiting for the order to arrive, but so far, I am extremely confident and happy with Autoplicity!

BEST PRICE AROUND, HANDS DOWN. Shipping was fast and communication was impeccable. THANKS FOR THE PROFESSIONALISM.

Fast shipping. Autoplicity has the best pricing I can find. <br>Very happie.

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