Product Information
Part #: 930285017. These Mahle Pistons PowerPak come with a 99.5mm bore, 3.11 stroke, 5.137 rod, 23mm pin, 1.209 C/D, and an 8.5:1 compression ratio. With a - 22cc dome volume and weighing 399 grams, they're perfect for Subaru Impreza (2004 - 2007). The Mahle PowerPak is a complete piston assembly kit proven in races. It includes hand - deburred, forged pistons with performance coating, high - quality steel pins, round wire locks, and low - drag performance rings. We use Mahle forged pistons in our dragster because of their strength and high - quality GRAFAL coating. The pistons feature a CNC - machined crown, hand - deburred finishing, forced pin oiling with machined drain backs, lightweight slipper skirt forgings, CNC - finished pin bores, reliable round wire locks, and pre - fitted German steel high - strength pins. Mahle's ultra - flat ring grooves and low - drag rings offer better sealing. The GRAFAL coating on the piston skirts reduces friction, increases scuffing resistance, improves durability, and allows for a closer piston - to - wall clearance, which significantly lowers engine noise.
Using these Mahle pistons is straightforward. First, make sure your engine is clean and in good condition before installation. When installing, handle the pistons with care to avoid any damage to the coated surface. Follow the standard piston installation procedures in your vehicle's manual. As for maintenance, regularly check the engine oil level and quality. Clean oil helps keep the pistons and other engine components working well. Also, monitor the engine temperature. Overheating can cause issues with the pistons. If you notice any unusual noises or performance changes in your engine, have it checked by a professional right away. With proper use and maintenance, these pistons will serve you well for a long time.
