Mahle Pistons PowerPak 99.5mm Bore 8.5:1 Comp Subaru WRX / STI EJ25 2004-2021

4 In stock
Engine Pistons/Rings

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Part #: 930285017

Pistons PowerPak 99.5mm Bore; 3.11 Stroke; 5.137 Rod; 23mm Pin; 1.209 C/D; 8.5:1 Compression Ratio; -22cc DomeVolume; 399 Gram Weight [Subaru Impreza(2004-2007)]

The Mahle PowerPak is a complete, race proven piston assembly kit composed of hand deburred, forged, performance coated pistons, high quality steel pins, round wire locks, and low drag performance rings. We race Mahle forged pistons in our dragster and highly recommend them for their strength and high quality GRAFAL coating.

Features: Forged Aluminum Pistons CNC machined crown, Hand deburred finishing, Forced pin oiling with machined drain backs, Lightweight slipper skirt forgings, CNC finished pin bores, Race Proven reliable round wire locks, and Pre-fitted German steel high strength pins. Mahle's ultra flat ring grooves and low drag rings offer improved sealing

Improved coating for less friction. The piston skirts on Mahle pistons are coated with GRAFAL by Mahle. This coating helps to reduce friction, increase scuffing resistance while improving durability and enable a closer fitting piston to wall clearance for significantly lower engine noise.


Any returns for an exchange or refund will be allowed within 30 days from the receipt of your order and must be authorized prior to shipping with an RMA Number (Return Merchandise Authorization). To receive your return instructions and RMA# please use our online form under Returns and Exchanges! Once you receive your return instructions please ship out the item at your earliest convenience and provide the tracking number to your customer service rep. The customer will be responsible for all shipping fees. Before shipping your product back please make sure you package it up exactly how you received it and in all of its original packaging. All items must be in brand new and resalable condition. Once the item is received it will be inspected and a credit will be issued accordingly. All returns are subject to a 15% restocking fee. Any returns received without an RMA# will be charged a restocking fee and any shipping fees associated with the return. An item that does not ship directly from IIR's warehouse is considered a "special order" item and no returns will be authorized.

Mahle Pistons PowerPak 99.5mm Bore 8.5:1 Comp Subaru WRX / STI EJ25 2004-2021
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