What are the specific dimensions of these piston rings?

This Mahle piston ring set is designed for a 4.030 inch bore. The top and second rings measure 1.5mm in thickness, and the oil control ring measures 3.0mm in thickness.

Are these rings suitable for all engine types?

These are 'drop-in' rings intended for standard engine rebuilds. While they are universal in size for a 4.030 bore, you should always verify that these specific dimensions and tension types are correct for your engine's specifications before installation.

Why are these rings not CARB approved?

This piston ring set is not CARB (California Air Resources Board) approved, meaning it does not meet California's emissions standards. Consequently, it cannot be legally shipped to California.

Mahle Piston Ring Set 4.030in 1.5mm 1.5mm 3.0mm 4030MS-15D

Name: Mahle MS 4.030in 1.5mm 1.5mm 3.0mm Drop-In Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-030in-1-5mm-1-5mm-3-0mm-drop-in-rings-t14-29858
Price: 158.86 USD
Availability: BackOrder

Mahle MS 4.030in 1.5mm 1.5mm 3.0mm Drop-In Rings

$158.86

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Mahle 4.030 inch piston ring set with 1.5mm, 1.5mm, and 3.0mm ring sizes. Part# 4030MS-15D. Not CARB approved.

Key Features

Fits 4.030 inch bore size.
Includes 1.5mm top ring, 1.5mm second ring, and 3.0mm oil ring.
Standard tension drop-in design for straightforward installation.
Mahle brand offers a well-known reputation in engine components.
Not CARB approved; cannot ship to California.

This is a universal piston ring set designed for a 4.030 inch bore. Always confirm compatibility with your specific engine application and refer to manufacturer specifications.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

This is a Mahle 4.030 inch piston ring set, featuring standard tension drop-in rings with dimensions of 1.5mm for the top and second rings, and 3.0mm for the oil ring. These rings are designed for engine rebuilds where precise sealing between the piston and cylinder wall is critical for performance and longevity. Proper ring seal ensures efficient combustion, prevents blow-by, and manages oil consumption.

Mahle is a well-known name in engine components, and this set is built to meet the demands of an engine rebuild. The specific ring sizes (1.5mm, 1.5mm, 3.0mm) are common for many applications, and the 'drop-in' design means they are intended for straightforward installation onto the piston without requiring specialized tools or modifications, assuming the piston groove dimensions are correct. This set is a solid option for mechanics looking for reliable piston rings for a standard engine overhaul.

Please note that this ring set is not CARB approved and cannot be shipped to California. Always refer to your vehicle's specific service manual for detailed installation procedures and specifications.