Yes. Kami Speed is an authorized ACT (Advanced Clutch Technology) dealer sourced directly through ACT in Lancaster, California. Every clutch kit, Mod-Twin, and flywheel ships in original ACT packaging with full ACT documentation, SFI certification (where applicable), and the 1-year limited warranty intact. ACT counterfeits are rare since all production is in-house at ACT's California facility, but gray-market sellers occasionally circulate pulled parts or old stock at suspicious prices. Authorized purchasing keeps your warranty valid, gives you access to ACT's tech support for application questions, and ensures the part you receive matches the spec it was designed to.

Most in-stock ACT clutch kits and flywheels ship within 1 to 3 business days from US warehousing. Popular Honda K-series, Subaru EJ20/EJ25, Mitsubishi 4G63, Nissan SR/RB/VQ, Toyota 2JZ, and Mustang/Camaro applications are typically stocked. Less common applications, full Mod-Twin twin-plate configurations, and specific Xtreme variants may have a 1 to 2 week lead time from ACT. We confirm exact stock and ETA at order placement.

ACT clutch kits and flywheels carry a 1-year limited warranty — significantly longer than the 90 to 120 day warranties that are industry-standard for performance clutches. The warranty covers defects in materials and workmanship for unused and properly installed components. Returns on unused, uninstalled clutches and flywheels in original packaging are accepted within 30 days. Once installed, clutches and flywheels are no longer returnable — friction surfaces, contact patterns, and crank-to-flywheel mating change on first use. Defective products are handled through ACT's warranty program, and Kami Speed processes RMA claims on your behalf.

ACT Heavy Duty Performance Street is the streetable performance upgrade — increased holding capacity over stock, retains a near-OEM pedal feel, sprung hub for smooth engagement. Good for bolt-on builds and mildly tuned cars. Heavy Duty Race steps up with the same pressure plate but aggressive friction options: 4-pad and 6-pad discs in sprung or rigid hub configurations, designed for serious street/strip and track use with firmer pedal effort. Xtreme Performance is the next tier — higher clamp load pressure plate paired with HD or race discs, for built engines and high-boost setups where Heavy Duty isn't enough. Mod-Twin is ACT's twin-plate solution: two friction discs, intermediate plate, and dramatically higher torque capacity for 600+ horsepower applications and dedicated race builds. Honest take on selection: if you can run a single-disc, run a single-disc — Mod-Twin has known drivability tradeoffs (chatter, harder engagement, weight) that aren't great for daily drivers. Most builds belong in Heavy Duty or Xtreme.