BMW E30 318is - 325i - M3 – Ø 184mm (7.25") Lightweight Twin-Plate Clutch Kit

Ø184 mm (7.25") Lightweight Twin-Disc Clutch Kit

Applications:

BMW engines:

• M20 (320i, 323i, 325i, 325ix)
• M30
• M42B18 (318is)
• S14

Kit Includes

✔ Ø184 mm (7.25") Twin-Disc Clutch
Ultra-lightweight assembly – only 4.20 kg

✔ Ø184 mm (7.25") Lightweight Flywheel – 3.7 kg

✔ Clutch release bearing set

✔ Clutch disc alignment tool

Component Features

Flywheel

• Weight: 3.7 kg
• Material: Forged CrMo steel, nitriding heat-treated
• Surface hardness: HRC 58–62
  → More than twice the hardness of standard flywheels
  → Prevents premature wear of the starter ring gear in high-compression engines
• Longevity: High surface hardness ensures extended service life and reliability

Clutch Cover

• Material: Forged 6061-T6 aluminum, hard anodized
• Construction:
  Steel-riveted legs designed for near-lifetime durability
  Hardened steel thrust buttons/rivets provide a smooth, wear-resistant contact surface for clutch cover legs, pressure plate, and floater plates
• Cover-to-flywheel bolt torque:
  41 Nm (M8x1.25, grade 12.9)

Pressure Plate & Floating Plate

• Material: Forged chromoly steel
• Treatment: Cryogenically treated (in selected applications)

Sintered Clutch Discs – Ø184 mm (7.25")

• Material: Proprietary blend of sintered metal compounds, manufactured to precise tolerances
• Standard disc design:
  Three large friction pads for optimal engagement, durability, and reliability
• Hub:
  Machined from forged chromoly steel and induction hardened for maximum strength and wear resistance
• Customization:
  Available upon request (e.g. custom spline configurations)

Clutch Release Bearing & Specific Aluminum Support

• Release bearing:
  Racing-grade bearing designed to withstand extreme mechanical loads and high operating temperatures
• Aluminum support:
  AL6061-T6, hard anodized, combining lightweight design with high structural strength

Clutch Alignment Tool

Precisely designed to match the geometry of the transmission input shaft and pilot bearing, ensuring perfect clutch disc alignment during installation

Key Features & Benefits

✔ Twin-disc configuration rated for over 1,000 hp / 1,200 Nm (depending on specification)

✔ Significant weight reduction vs OEM
→ Faster acceleration
→ Improved throttle response
→ Better handling and braking performance

✔ Improved gear shifting at high RPM

✔ Extended lifespan of friction components → reduced long-term replacement costs

✔ Plug & Play installation → no vehicle modifications required

✔ Excellent pedal feel and modulation

⚠️ Depending on the existing vehicle modifications, minor setup adjustments may be required.