Manley Chevy LT1 Direct Injected Series 4.00in Stroke 4.135in Bore -20 cc Dish Extreme Duty Pistons

Manley Performance is well-known for building strong, reliable engine components, and these Extreme Duty pistons are a prime example of that commitment. Designed for Chevy LT1 Direct Injected engines, these pistons are built to handle demanding builds with a 4.00-inch stroke and a 4.135-inch bore, featuring a -20cc dish to help achieve your desired compression ratio.

These pistons start with domestic 2618 alloy forgings, a material chosen for its exceptional strength and performance under high stress. They feature proven cam and barrel skirt profiles, which are shaped to generate substantial power while also being gentle on your cylinder walls, reducing wear over time. Manley's unique fixturing process allows them to machine the skirt and ring grooves in a single operation. This ensures the ring grooves are perfectly square to the skirt, which is critical for an enhanced ring seal and ultimately, more power from your engine.

Included with these pistons are premium Chrome Moly wrist pins, known for their durability. For those pushing the limits, Manley offers upgrades to even tougher alloys like 9310 and Turbo Tuff/DLC. The exacting standards applied to the ring lands and grooves further contribute to a better ring seal. These pistons are a solid option for professional engine builders and tuners looking for superior performance and durability in their builds.