Multiple U.S. Warehouse LocationsBroken ApexFree shipping on qualified orders over $100*
The Mahle 3 mm piston ring support rail sized for 4.040–4.080 bores is supplied to fit corresponding piston and ring assemblies. This support rail is intended to provide proper ring seating and support within the specified bore range as part of an engine rebuild or ring replacement. Confirm bore dimension compatibility before installation to ensure the rail matches the engine specifications.
Mahle MS 4.040-4.080 3mm Support Rail
