This is for the bare Sonnax drum, if you want clutches you will have to add which stackup you prefer.
New updated drum, now with stronger bolts
The Sonnax Smart-Tech® Billet Overdrive Housing is engineered with increased clutch apply surface area for significantly improved holding power in high-load applications.
Designed for flexibility, this housing can be configured with:
• Six dual-sided clutches for a strong, reliable performance build
OR
• Our HP clutch stack, providing up to 16 friction surface areas for maximum torque capacity
A premium upgrade for builds that demand greater durability and clutch holding strength.