Transform Your Mitsubishi Lancer Evolution's ACD with Racing Diffs Block Discs Upgrade your Mitsubishi Lancer Evolution 7, 8, 9, and 10 with our Block Discs for the ACD (Active Central Differential), providing a 100% permanent lock. This setup is ideal for high-performance drag applications with 1000+ HP. Fitment: Mitsubishi Lancer Evolution: Evo 7 Evo 8 Evo 9 Evo 10 Key Features: 100% Permanent Lock: Our Block Discs ensure that the front and rear differentials remain engaged all the time, allowing you to disengage all electronics. Perfect for Drag Racing: Ideal for all drag applications with 1000+ HP. This setup keeps your unit safe and wear-free, ensuring optimal performance during 1/4 mile races. Easy Switching: If you drive your car daily and occasionally participate in drag races, you can easily switch to a 100% lock setup by replacing your OEM plates with Block Discs. After the race, switch back to the 'street setup' with ease. Why Choose Racing Diffs Block Discs? Plug & Play Installation: No modifications are required, making the installation process straightforward and hassle-free. Unlimited Lifetime Warranty: Our Block Discs are covered by Racing Diffs Unlimited Lifetime Warranty, ensuring long-term reliability and performance. Direct Fit: All parts fit the OEM Mitsubishi unit without any modifications. Upgrade and Maintain Your ACD: Transform your driving experience with Racing Diffs Block Discs. Whether for daily driving or high-performance drag racing, our Block Discs provide the ultimate solution for your Mitsubishi Lancer Evolution. OEM Part Numbers: MR195402 MB160497 MB160500 RA279300K1