CP Piston & Ring Set Bore 100mm Size +0.5mm CR 10:1 WRX / STI Subaru EJ25 Turbo Models 2004-2021

Part #: SC7417. CP's forged pistons for WRX and STI models are a game - changer. They offer excellent ring seal, higher vacuum, less blow - by, and greater durability. Throughout the power band, you'll get increased horsepower and torque, and the peak horsepower stays strong for the life of the piston rings. This is thanks to lightweight forgings and CP's unique machining methods. CP is all about racing, and it shows in every piston. They use the latest forging techniques and CNC machinery, and their strict quality control ensures a top - notch, high - performance, and reliable product every time. CP has some of the highest quality control standards in the industry. As a part of Pankl Racing Systems, which supplies parts to top racing teams and elite companies like Ferrari and Porsche, you won't find a better piston for your EJ20 or EJ257.

Using your CP piston and ring set is straightforward. First, make sure your engine is clean and free of debris before installation. Follow the standard installation procedures recommended by your vehicle's manual or a professional mechanic. When it comes to running in your new pistons, drive gently for the first few hundred miles. This helps the pistons and rings to seat properly. As for maintenance, regularly check your engine oil level and quality. Dirty oil can cause premature wear on the pistons. Also, keep an eye on your engine's temperature. Overheating can damage the pistons. If you notice any unusual noises or a drop in performance, it's a good idea to have your engine checked by a professional right away.