ACT 600145-03 Streetlite Flywheel Kit with CW03 Counterweight for Mazda RX-7/RX-8

ACT

<h3>Advanced Clutch Technology: Performance-Engineered Driveline Solutions</h3><p>Since 1994, Advanced Clutch Technology has specialized in delivering the highest performing driveline components in the industry. Founded by Dirk Starksen in Lancaster, California, ACT has grown from a side venture into one of the most respected names in performance clutch manufacturing. What sets ACT apart is their commitment to in-house engineering and manufacturing—the company is the only one that manufactures its own patented diaphragm springs, the critical component that creates clamping force and determines torque capacity.</p><p>Operating from a 22,000-square-foot facility in Lancaster, ACT designs, engineers, tests, and assembles every product on-site. The company doesn't rebuild from factory discs or offer any stock replacement stuff, only performance applications. This laser focus on performance means every component is purpose-built to exceed the demands of modified engines, track duty, and spirited street driving.</p><h3>Precision Manufacturing and Quality Control</h3><p>ACT's manufacturing philosophy centers on precision and repeatability. The USA manufacturing plant utilizes specialized production test equipment to check clamp load, verify release travel, computer dynamic spin balance and diaphragm cycling before shipping. The engineering team employs advanced CAD, FEA simulation, and CAM tools to optimize performance and reliability. Where 90-120 day warranties are the norm, ACT's 1-year limited warranty signifies this promise, giving enthusiasts confidence in their investment.</p><h3>Complete Clutch Component Solutions</h3><p>From <a href="/15-act-clutch-friction-disc-10605">clutch friction discs</a> to complete <a href="/15-act-clutch-flywheel-5348">clutch flywheels</a>, ACT offers comprehensive coverage for sport compact, domestic, European, and diesel truck applications. Their product lineup includes <a href="/15-act-clutch-release-bearing-1968">clutch release bearings</a> engineered for consistent pedal feel and long service life, as well as specialized tools like <a href="/15-act-clutch-alignment-tool-7700">clutch alignment tools</a> that ensure proper installation. For advanced builds, ACT even manufactures <a href="/15-act-clutch-flywheel-counterweight-21611">clutch flywheel counterweights</a> to fine-tune rotating assembly balance.</p><p>ACT uses one-piece Chromoly steel forgings, the strongest manufacturing method available, to best align the internal grain structure. Their Streetlite flywheels deliver significant weight reduction with minimal drivability compromise, while Prolite versions are aggressively tuned for competition use. Whether you're upgrading a daily driver or building a championship-winning race car, ACT's rigorous development process ensures components that perform as promised.</p><h3>Racing Heritage and Real-World Validation</h3><p>Born from racing, ACT has helped supply driveline components to some of the most powerful drag racers, competition drift cars and land speed record holders in history. This racing heritage informs every design decision, ensuring that street products benefit from lessons learned at the track. Each new product undergoes extensive vehicle testing, dynamometer validation, and laboratory analysis before receiving production approval. The result is a product line that delivers measurable performance gains and stands up to the most demanding applications.</p>