





The Pro Billet: Precision Crafted. Track Proven. Champion Approved
For racers who demand superior rotational strength, optimized performance, and maximum tunability from their drag‑race clutch, RAM delivers the competitive edge. The Pro Billet series is purpose‑built for racers who demand absolute control, maximum efficiency, and elite‑level performance under extreme conditions.
Each Pro Billet clutch incorporates a billet‑aluminum, stand driven pressure ring, adjustable titanium stands, and premium‑grade hardware, delivering unmatched durability and structural stability under the most extreme racing conditions. Base‑pressure adjustments are effortless thanks to clearly numbered, easy‑to‑read spring cups that streamline setup and fine‑tuning.
All RAM Pro Billet units feature advanced lever architecture. RAM Pro Billet clutches deliver precise, repeatable control over centrifugal loading. Through solid‑modeling development, each lever profile is engineered to apply pressure directly across the center of the pressure ring, maximizing counterweight efficiency throughout the entire RPM range. The result is consistent, highly tunable engagement tailored to the demands of your specific combination.
Available in single, dual, and triple‑disc configurations, RAM Pro Billet units utilize high‑performance 5135 or 5191 friction materials and are offered in diameters from 6.25″ to 10″, ensuring broad compatibility across a wide range of competitive builds. Multi‑disc models can be further enhanced with an optional bronze floater upgrade for racers seeking maximum tunability and heat management. Serviceability is engineered in from the start, with replaceable ring gears and modular clutch components designed for long‑term durability and fast turnaround between rounds.
All RAM multi disc Pro billet units require a minimum bellhousing depth of 8 1/8 inches. For applications with a shallower bellhousing, our Defiant line of clutches provide a high‑performance alternative engineered to meet your racing demands.
Want more information or a custom quote? Please fill out our custom clutch spec form!
What makes the Pro Billet drag racing clutch so special?


Construction & Materials
- Lightweight CNC‑machined billet‑aluminum flywheel engineered for reduced rotating mass and faster engine acceleration
- Billet‑aluminum, stand‑driven pressure ring designed for maximum rotational strength and consistent clamp load at high RPM
- Adjustable titanium stands with premium‑grade hardware for superior strength and long‑term durability
Adjustability & Tuning Capabilities
- Easily adjustable base pressure with clear reference points for precise clutch tuning
- Dial indicator and counterweight kit included for accurate centrifugal setup and engagement control
Friction Materials & Heat Management
- Available with high-performance 5135 or 5191 friction materials
- Optional bronze floater upgrade enhances heat dissipation, durability, and tunability in multi‑disc applications
- Replaceable ¼‑inch heat shield on the flywheel for extended service life and improved thermal protection
- Replaceable ring gear for simplified maintenance and reduced long‑term operating cost
Configurations & Application Coverage
- Offered in single, dual, or triple‑disc configurations
- Available in 6.25″, 7″, 8″, and 10″ diameters
- Available in all popular spline configurations
Ready to dial in your set-up with a Pro Billet series clutch? Use our easy and convenient Custom Clutch Specification form to connect with us, or give us a call with any questions you may have.


6.25 Inch Pro Billet Clutch
Use: NHRA Pro Stock, Comp Eliminator
Weight: 19-22 lbs.
Pressure: 0-1080 lbs.
Upgrade Options: 3 disc, titanium cover, pressure ring
Splines: 1 3/8-10, 1 3/16-18, 1 1/8-26


7 Inch Pro Billet Clutch
Use: NHRA Pro Stock, Comp Eliminator, Sport Compact RWD
Weight: 25-31 lbs.
Pressure: 0-1440 lbs.
Upgrade Options: 2 or 3 disc, bronze floaters, titanium cover, pressure ring
Splines: 1 3/8-10, 1 3/16-18, 1 1/8-26


8 Inch Pro Billet Clutch
Use: Top Sportsman, Comp Eliminator, Super Stock, Sport Compact RWD, Drag & Drive, 10.5 tire classes
Weight: 26-44 lbs.
Pressure: 0-1440 lbs.
Upgrade Options: 1, 2 or 3 disc, bronze floaters
Splines: 1 3/8-10, 1 3/16-18, 1 1/8-26, 1 1/4-29


10 Inch Pro Billet Clutch
Use: Mountain Motor Pro Stock, Nitrous Pro Mod, Top Sportsman, Drag & Drive, 10.5 tire classes
Weight: 34-60 lbs.
Pressure: 420 base, 690 base, 900 base
Upgrade Options: 1, 2 or 3 disc, bronze floaters, titanium pressure ring
Splines: 1 3/8-10, 1 3/16-18, 1 1/8-26, 1 1/4-29

Use: Pro Mod, Supercharged, Pro Outlaw classes