

Great news – on this purchase, you'll enjoy a BuildBUX bonus of $1.51.
Regular Price: $200.24 - Instant discount: $49.73 = $150.51
Product Fitment:
2002-2014 Subaru WRX
2004-2021 Subaru STI
2005-2012 Subaru Legacy GT
2005-2009 Subaru Outback XT
2004-2013 Subaru Forester XT
Restore factory performance and reliability with the Mahle OE Piston Ring Set for Subaru WRX (2002–2014), STI (2004–2021), and Legacy GT (2005–2012). Mahle is a world leader in OEM engine components, and their piston rings are engineered to meet the strict demands of modern performance engines.
Built using advanced OE-driven technology, Mahle piston rings are designed to reduce friction, minimize oil consumption, and extend service life under both daily use and high-performance driving. Their lightweight design and precise ring tension promote efficient sealing, improved combustion, and consistent cylinder pressure—crucial for turbocharged EJ engines.
Whether you’re rebuilding a stock motor or refreshing a performance setup, Mahle’s 42308CP piston rings deliver the durability, reliability, and exact fitment expected from a top-tier OEM supplier.
OE-level design and manufacturing quality
Reduced friction for improved efficiency and performance
Lower ring mass for faster response and better sealing
Minimizes oil consumption and blow-by
Long service life backed by industry-leading technology
Trusted by engine builders for turbocharged Subaru EJ applications
Upgrade your engine rebuild with the proven performance and OE reliability of Mahle piston rings.
More Cashback
Get more cashback! Items are changing weekly. Anywhere from 1% to 20% Back in BuildBUX when you make purchases. Products
Free Money
Every month when you are charged your $4.98 subscription fee, you will get $15 in BuildBUX
Easy To Cancel
Cancel anytime, month to month terms.
Cashback
Get 1% back on every purchase on eligible brands.
Free
Completely free to use. Just place an order!