Spec Clutches E30 325i/is SPEC Stage 4 Racing Clutch Kit (SpecE30) SB104

E30 325i/is SPEC Stage 4 Racing Clutch Kit (SpecE30)

The SPEC Stage 4 clutch is designed for race and track use where light weight and a grippy clutch material are paramount to quiet and smooth operation on the street. The Stage 4 is popular in the SpecE30 racing series and for other track cars. It uses a rigid center hub with 6 clutch pucks and no springs instead of a full clutch disc. This makes the whole assembly lighter and simpler (less likely for a failure). The friction material is rated at 425 ft-lbs, more than enough for a naturally-aspirated E30. A heavy-duty pressure plate and throw-out bearing complete the package. If clutch or flywheel woes are keeping you from getting the most from your E30 this is the clutch you should be using.

The stock clutch in the M20 E30 is not terrible but can become quickly overheated and lead to glazing on the flywheel surface and inconsistent engagement. A more robust material is needed to handle the extreme temperatures found at the track. The SPEC Stage 4 clutch consists of a carbon/semi-metallic friction material paired with a heavy-duty pressure plate. The clutch is stronger and grabs harder than the factory clutch. It has a much more robust feel and engagement. And with this specification the clutch will never be a weak point. The clutch is rebuildable to help minimize consumable costs. The SPEC clutch is designed to work with the stock dual mass flywheel or the SPEC single-mass aluminum flywheel. If this is for racing, check your rules to confirm which flywheel can be used.

SPEC Clutch is one of the premier clutch and flywheel suppliers to the tuner market. They are often found on the most highly tuned import and domestic vehicles. They are recent players in the German car community with a special focus on the newer turbo BMW models with high torque output. SPEC has been proven time after time to provide superior performance, drivability, and longevity to the most hardcare enthusiasts around the globe.

E30 325i SPEC Clutch Kit contents:
+ carbon/semi-metallic 6-puck clutch disc (rigid center hub)
+ heavy-duty pressure plate
+ heavy duty throw-out bearing

This item fits the following BMWs:
1987-1991 E30 BMW 325i 325is
T#: 340439 | Part#: SB104
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Starting at $454.00
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I Will Re-Use My Stock Flywheel.
Send Me A New OEM Flywheel (#11221706573)
Genuine BMW - Corporate Logo
T#: 19145
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Part#: 11221706573
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No Lifetime Replacement
Sale - Save 3% $421.99
$408.81
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Send Me The SPEC Aluminum Flywheel. (#SB29A)
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T#: 342328
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Part#: SB29A
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Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
$579.00
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E30 325i/is SPEC Stage 4 Racing Clutch Kit (SpecE30)
Spec Clutches - Corporate Logo
T#: 343921
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Part#: SB104P
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This product is backed by our
Lifetime Replacement Program! Read more here
$454.00
Qty: 1
Clutch Ball Pin 21511202659
MTC - Corporate Logo
T#: 15225
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Part#: 21511202659
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Est. Ship Date:
Ships Jul 11, 2025
$0.64
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MTC Clutch Fork Lever - Multiple BMWs
MTC - Corporate Logo
T#: 19643
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Part#: 21511204229
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Est. Ship Date:
Ships Jul 8, 2025
$7.99
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Fork Lever Spring - E12 E21 E23 E24 E28 E30 E34 - (NO LONGER AVAILABLE)
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T#: 340659
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Part#: 21511204327
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$7.99
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E30 325i/is SPEC Stage 4 Racing Clutch Kit (SpecE30)
$454.00