Spool ZF 8HP70/75/76 Billet 7075-T6 D Clutch Drum

Spool Performance 8HP70 / 8HP75 / 8HP76 upgraded billet 7075-T6 D Clutch Drum The factory A380 cast-aluminum D-drum in the ZF 8HP70/75/76 is one of the weak links once power levels rise—prone to cracking, distortion, and oil starvation under high load and high RPM clutch events. Spool Performance eliminates that limitation with a fully CNC-machined billet 7075-T6 D Clutch Drum , engineered for extreme durability and precise hydraulic control in high-horsepower builds. Why 7075-T6? Superior Strength Where It Matters Most OEM drums use A380 cast aluminum , chosen for cost—not strength. By contrast, 7075-T6 aerospace-grade billet aluminum delivers: Massive Strength Increase Over A380 7075-T6 tensile strength: ~74–78 ksi A380 cast aluminum: ~46 ksi Result: Significantly higher resistance to cracking, deformation, and fatigue under aggressive clutch pressure spikes.

Fits: BMW M3 (G80), M4 (G82/G83), X3 M (F97) and X4 M (F98) with the 8HP76 automatic

Brand: Spool Performance

• Ships from the brand or distributor, usually in 3–7 business days.
• Free US shipping on orders over $250.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.