Manley 03-06 Evo 8/9 (7 Bolt 4G63T) 87mm +2mm Over Bore 8.5:1 Extreme Duty Dish Pistons w/ Rings

If you're building a high-performance engine for your 2003-2006 Mitsubishi Lancer Evolution 8 or 9 with the 7-bolt 4G63T engine, these Manley Extreme Duty Dish Pistons are a solid choice. They are designed for an 87mm bore, which is a +2mm overbore from stock, and feature a dish design with a compression ratio of 8.5:1. This setup is ideal for those looking to push their engine's capabilities further.

Manley uses domestic 2618 alloy forgings for these pistons, a material known for its exceptional strength and ability to handle the stresses of a performance engine. The pistons also feature proven cam and barrel skirt profiles, which help reduce friction and wear on your cylinder walls while still allowing the engine to make substantial power. You'll also find exacting standards applied to the ring lands and grooves, which is crucial for achieving a better seal with your piston rings, leading to more efficient combustion and increased power output. Manley's unique fixturing process allows them to machine the skirt and ring grooves in one operation, ensuring the ring grooves are perfectly square to the piston skirt for optimal performance.

This set includes premium chrome moly wrist pins, which are built to last. For those seeking even more durability, Manley offers upgrades to 9310 and Turbo Tuff/DLC alloys on select part numbers. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. They are designed for serious engine builds where reliability and performance are paramount.