Manley Ford XR-6 Turbo 4.0L 3.91in Stroke 3.647in Bore 9:1 CR -10cc Dish Piston Set w/Rings

This Manley Performance piston set includes forged pistons, rings, and tool steel wrist pins, ready to be installed in your Ford XR-6 Turbo 4.0L engine. These pistons are built with a 3.647-inch bore and a -10cc dish, designed to achieve a 9.1:1 compression ratio, making them a solid choice for performance builds where you need more than stock power but still want reliable street manners.

Manley uses domestic 2618 alloy forgings for these pistons, which are known for their strength and ability to handle the stresses of a boosted engine. The pistons feature proven cam and barrel skirt profiles that help reduce friction and wear on your cylinder walls, while the exacting standards for ring lands and grooves ensure a good seal for improved power output. The tool steel wrist pins included add to the overall durability of the assembly.

For those building a high-performance XR-6 Turbo, Manley's unique machining process ensures the ring grooves are perfectly square to the piston skirt, which is critical for consistent ring seal under boost. Keep in mind that these pistons are not CARB approved and cannot be shipped to California. You'll want to refer to the manufacturer's installation instructions for specific details on fitting these to your engine.