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MAHLE 4255MS Piston Ring Set Bore File Fit - 4.250 1/16 1/16 3/16

Manufacturer

Picture for manufacturer MAHLE

Part Number

4255MS
8 reviews
Sale Price

$104.51

Estimated ship date Saturday, November 21

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The MAHLE 4255MS is a premium piston ring set engineered for high-performance engine builds requiring precise bore dimensions. Designed for a 4.250-inch bore diameter with a +0.005-inch oversize tolerance, this ring set delivers excellent seal and durability in demanding applications.

Ring Configuration:

  • Top compression ring: 1/16-inch width
  • Second compression ring: 1/16-inch width
  • Oil control ring: 3/16-inch width

Key Features:

  • File-fit design allows custom end gap adjustment for optimal performance
  • Precision-manufactured to MAHLE's strict quality standards
  • 4.250-inch bore diameter with +0.005-inch oversize specification
  • Ideal for engine rebuilds, racing applications, and performance builds
  • Compatible with various V8 and larger displacement engines requiring this bore size

MAHLE's file-fit piston rings give engine builders the flexibility to precisely set ring end gaps for specific applications, ensuring optimal compression, oil control, and long-term reliability. Each ring is manufactured from premium materials with advanced coatings to reduce friction and extend service life.

Products specifications

Bore (in)

4.250 in.

Bore (mm)

107.950mm

File Fit

Yes

Gapless

No

Oil Ring Included

Yes

Oil Ring Material

Stainless steel

Oil Ring Tension

Standard

Oil Ring Thickness

3/16 in.

Quantity

Sold as a set.

Second Ring Facing Material

Cast iron

Second Ring Included

Yes

Second Ring Material

Cast iron

Second Ring Thickness

1/16 in.

Top Ring Facing Material

Plasma-moly

Top Ring Included

Yes

Top Ring Material

Ductile iron

Top Ring Thickness

1/16 in.

Prop 65

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Piston Ring Thickness

1/16, 1/16, 3/16

Item in-stock and shipped fast. Will definitely buy again from seller.

Excellent price and fast shipping. Product showed up as described and timely.

Thanks Autoplicity you had the best prices I could find, fast shipping, and everything I ordered was exactly what I was looking for! Great Customer Service!

Great price, I got a CAI and an air scoop for my 03 Silverado 1500 HD for the cheapest I found anywhere on the internet. Excellent customer service. I would definitely buy from them again.

Great price. Very happy with order. Will buy from them again.

absolutely lowest price on my Griffin radiator and super fast with the shipping to boot, what more could you ask for!

Quickly received item. Exactly what I ordered and was best price out there. Will do business with them again.

Great pricing and delivered in 3 days.

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