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Engines and Components› Oiling Systems

Mahle

Piston With Rings BMW 3.0L S50 B30 O S 0.40MM

$230.32 $173.69 Save $56.63

SKU: M002 830302

In Stock
In Stock
Ships by Jun 11
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Mahle piston with rings set is designed for BMW 3.0L (S50 B30) engines and includes a set of six pistons with rings. These pistons feature a flat top design with two valve reliefs and are constructed from forged aluminum for durability and performance.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMahle
Part NumberM002 830302

Videos

Oil Ring FAQs

Oil Ring FAQs
Piston Ring Order

Piston Ring Order
Installing Rings on the Piston

Installing Rings on the Piston
How to Properly Install Rings on a Piston

How to Properly Install Rings on a Piston
How to File Fit Rings for Your Engine: Guide to Proper Gap

How to File Fit Rings for Your Engine: Guide to Proper Gap
A Look at Piston Coatings

A Look at Piston Coatings
Piston Rings 101: Total Seal Gapless Rings - with Lake Speed Jr.

Piston Rings 101: Total Seal Gapless Rings - with Lake Speed Jr.
Performance Diesel Cast Pistons vs OE Pistons

Performance Diesel Cast Pistons vs OE Pistons

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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