Manley 100mm (+.5mm) Overbore Pistons Subaru WRX 2006-2014 / STI 2004-2021 | 612005C-4

Part #: 612005C - 4. Manley's forged and dished pistons for the EJ257 are crafted from high - strength 2618 material. These pistons are lightweight but tough, offering a long service life. Every set comes free with round wire locks, tool steel wrist pins, and piston rings. A special multi - step top ring groove machining process ensures perfect control of groove size, shape, flatness, and finish. Precise pinhole machining gives an exact compression distance and accurate lock ring groove spacing, size, and concentricity. Available in standard size and a wide range of oversize/overbore options for high - performance engine builds. Note: All Manley pistons include a full set of four pistons, rings, and hardware. FITMENT: Subaru STI 04+, 06+ WRX. Part Number: 612005C - 4 (100mm (+.5mm) Overbore, 8.5 Comp. Ratio).

Using these Manley pistons is straightforward. Just follow your engine's assembly manual and install them carefully. When installing, make sure to handle the pistons gently to avoid any scratches or damage. Also, ensure that the round wire locks, tool steel wrist pins, and piston rings are properly placed. For maintenance, regularly check the pistons for signs of wear. If you notice any abnormal wear or damage, replace the pistons promptly. Keep the pistons clean and lubricated to ensure smooth operation. And always follow the manufacturer's recommended service intervals for your engine.