Manley 15+ Subaru FA20 WRX 86.50mm +.5mm Bore 10:1 Dish Piston Set w/ Rings (Extreme Duty)

If you're building a high-performance Subaru FA20 engine for your 2015 and newer WRX, Manley's Extreme Duty Piston Set is a solid choice. These pistons are designed to handle the demands of serious engine builds, offering a significant step up from stock components. They feature a 10:1 compression dish, which is a common target for many performance applications, and come in a 86.50mm bore size, a +.5mm overbore from the factory specification.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to withstand high temperatures and pressures. The pistons also feature proven cam and barrel skirt profiles, designed to reduce friction and wear on your cylinder walls while still generating power. You'll also find exacting standards in the ring lands and grooves, which is crucial for a good seal and maximizing the power your engine makes. These pistons come with tool steel wrist pins and moly skirt coatings, further enhancing their durability and performance under extreme conditions. Manley's unique manufacturing process ensures the ring grooves are perfectly square to the skirt, which is vital for proper ring function.

This set includes the pistons, rings, and wrist pins, making it a comprehensive solution for your engine rebuild. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. For optimal results, always refer to the manufacturer's installation instructions and consult with a professional engine builder.