fits model: Wrx, Sti. make: Subaru.

( Brand: Mahle ), ( Manufacturer Part Number: WRX209917I22 ), ( Part Type: Piston )
The Mahle MLS609954/WRX209917i22 Forged Pistons are a high-performance upgrade for Subaru WRX STI engines. These pistons are specifically designed for the Subaru Impreza WRX model years 2008-2014 (WRX209917i22), and they are forged from high-strength aluminum alloy, ensuring superior strength and durability.
The pistons feature a 99.5mm bore diameter, which is larger than the original OEM pistons, allowing for increased engine displacement and power output. The piston skirts are optimized for a precise fit in the cylinder bore, reducing friction and ensuring smooth operation. The piston crowns are designed with a dome shape for optimal combustion chamber volume, promoting efficient combustion and power delivery.
The pistons are also equipped with Mahle's advanced coating technologies, including Nikasil and DiamondLike Carbon (DLC), which provide excellent wear resistance, enhanced cylinder lubrication, and improved ring seal performance. This results in reduced engine wear, improved fuel efficiency, and longer engine life.
The Mahle MLS609954/WRX209917i22 Forged Pistons are also designed to work with high-compression, direct-injection engines, making them an excellent choice for performance enthusiasts looking to upgrade their Subaru WRX STI engine.
These pistons are manufactured to the highest standards of quality and precision, ensuring a perfect fit and reliable performance. They are backed by Mahle's industry-leading warranty, providing peace of mind for enthusiasts looking to upgrade their Subaru WRX STI engine with top-quality forged pistons.
Pros of buying Mahle Subaru WRX STI forged pistons (part number 209917i22) include:1. Increased power and performance: Forged pistons are stronger and more durable than cast pistons, allowing for higher compression ratios and increased engine performance.
2. Improved reliability: Forged pistons are less prone to failure under high stress and heat conditions, resulting in a longer engine life.
3. Enhanced engine response: The forged pistons' improved strength and rigidity can result in improved engine response and throttle response.
Cons of buying Mahle Subaru WRX STI forged pistons (part number 209917i22) include:1. Higher cost: Forged pistons are typically more expensive than cast pistons due to the manufacturing process and materials used.
2. Requires engine disassembly: Installation of forged pistons requires disassembling the engine, which can be a time-consuming and labor-intensive process.
3. Potential engine modifications: Depending on the engine's current state and modifications, the installation of forged pistons may require additional engine modifications, such as upgraded rods and crankshaft.
Recommendation:If you are looking to maximize the performance of your Subaru WRX STI and are willing to invest in high-quality components, the Mahle Subaru WRX STI forged pistons (part number 209917i22) are a great option. However, it's essential to consider the higher cost and potential engine modifications before making a decision. It's recommended to consult with a professional mechanic or Subaru specialist to ensure the installation process is completed correctly and to avoid any potential engine damage.
The piston crown is Still machinable.
Phosphate coating provides the grey appearance to Mahle piston.
Each kit is complete with a set of high performance rings, containing either low drag Power Park feature includes:- forged piston for performance applications fully-machined crown gravel anti-friction coating on skirts - phosphate-coated to reduce micro-welding and pin galling bores finished CBC boring equipment hand debarred high strength, light weight German steel pins race-proven round wire locks low drag ring pack slipper skirt forgings Males reduces drag, scuffing, friction cylinder bore wear noise.
Mahle PowerPC pistons the motor sports kit is Males high volume shelf stock program developed for performance enthusiasts and sportsman class racers.
This dry lubricant coating not to be confused with a thermal film provides in the pin bores and ring grooves until oiling system of engine reaches operating pressure particularly useful during initial start-up or break-in engines protect against galling micro welding.
The PowerPC pistons are predominantly made from 4032 aluminum alloy to allow for tighter cylinder wall clearances and improved temperature stability. 0mm set, or a 1 16, high performance ring Park standard with big block kits.