The Mahle custom diesel piston set is a made-to-order forged piston kit for Ford 6.4L with a 3.866" bore and built to customer-provided specifications. Sold as a custom, made-to-order assembly, buyers must provide detailed piston specs when ordering so Mahle can manufacture pistons to the required dimensions and performance needs.
Mahle MS Custom Piston Set Ford 6.4L 3.866in Bore (Must Provide Custom Specs for Pistons)