Billet 9″ – Twin 5 Button Ceramic Plate Clutch Kit
Considered to be the big daddy if the Direct Clutch Services billet range, the 9″ with its 40% increase surface area over the proven 8″ , the 9″ is considered the ultimate performance in the 1100-2000hp range
Like the 8″, the 9″ billet system can be customized to suit many larger engine and gearbox combination, utilizing a custom billet steel or aluminum flywheel. Being available in single, twin and triple plate configurations, the 8” unit can be tailored to your exact needs with a large range of friction materials, compounds, button arrangements, clamp ratings from 1500 – 4000lbs and so on. Made from the highest grade materials which are Australia, japan or USA sourced.
Supplied as a clutch and flywheel assembly the Direct Clutch Services 8″ billet system has proven to be a durable unit, in all rigorous applications and is usually an economical unit to rebuild when required.
All of the Direct Clutch Services billet single twin and triple plate units can be made to a specific target (assembly) weight. We are happy to advise / assist with this , but generally speaking , we suggest light weight for any constant high RPM application ie circuit , speedway , marine applications. We generally suggest the heavier the better for any street , drift , drag , and all 4×4. In recent times we have seen success in drag racing with the heavier (clutch and flywheel) assembly options. We have also seen gains in drifting with heavier flywheels being used. This generally sees the ability to turn the tyres at lower rpm clutch kicks as the engine is less likely to stall. We also see the heavier flywheel acting as a large(r) heat sink and allowing more heat to be absorbed into the flywheel before, thus initially taking heat away from the clutch. We have common assembly weights on file for most applications.
The Direct Clutch Services 9″ billet twin plate clutch & flywheel assembly is the most frequently sold of all our billet clutch systems. Available most commonly in 3 series.. This being street, competition and sintered series.
Additional information – 9 inch billet clutch kits
All Direct Clutch Services 9″ billet single , twin and triple plate units utilize solid / unspring clutch hubs. This is done for 2 reasons. The unsprung disc is lighter allowing for faster shifts. The second is a sprung hub is usually a weak link in the system.
In a back to back comparison, the sprung hub only offers dampening to sound and offers very little in drive feel other than just reduction in engine / gearbox feedback / noise , contrary to common opinion in the automotive world.