What does 'file fit' mean for these piston rings?

File fit means the ends of the top piston ring are left slightly open. This allows you to carefully file them down to the exact gap needed for your specific cylinder bore size during installation, ensuring optimal sealing.

What does the '+.005in' designation mean?

The '+.005in' indicates that these rings are slightly larger than standard size. They are intended for use in engine cylinders that have been machined and honed to a bore that is 0.005 inches larger than the original factory specification.

Are these rings suitable for all engine types?

These are universal rings designed for a wide range of applications, often used in custom engine builds or when replacing rings on engines that have been previously bored. Always confirm your engine's specific requirements and cylinder bore dimensions before purchasing.

Mahle Piston Ring Set 4635SS-043 - Universal

Name: Mahle MS 4.630in+.005in .043in .043in 3.0mm Steel STD Tension File Fit Rings
Brand: Mahle
SKU: mahle-mahle-ms-4-630in-005in-043in-043in-3-0mm-steel-std-tension-file-fit-rings-t14-132148
Price: 240.74 USD
Availability: BackOrder

Mahle MS 4.630in+.005in .043in .043in 3.0mm Steel STD Tension File Fit Rings

$240.74

On Backorder

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

Mahle universal steel piston ring set, part# 4635SS-043. Features .043in/.043in/.118in ring sizes and a +.005in file fit.

Key Features

Universal steel piston ring set for custom engine builds.
Top and second rings measure .043 inches thick.
Oil ring measures 3.0mm (approximately .118 inches).
Standard tension design for reliable cylinder sealing.
Top ring is file-fit, allowing for custom gapping during installation.
Oversized +.005 inches for honed cylinder bores.

⚠️ 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

When you're rebuilding the top end of your engine, getting the right piston rings is crucial for proper sealing and compression. This Mahle ring set is designed for a universal application, meaning it's built to fit a wide range of engines where specific OEM fitment isn't the primary concern, often used in custom builds or engine machining shops.

This set features steel rings with a standard tension design, which helps ensure a solid seal against the cylinder wall. The top and second rings are both .043 inches thick, while the oil ring is 3.0mm (approximately .118 inches). A notable feature is the 'file fit' design for the top ring, allowing you to precisely gap it to your specific cylinder bore size during installation, which is key for performance builds. This set is also +.005 inches oversized, intended for cylinders that have been honed to that specific dimension.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Always refer to your engine's specific service manual for correct installation procedures and ring gapping recommendations.