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MAHLE 4045MS Bore Piston Ring Set File Fit - 4.040 1/16 1/16 3/16

Part of: MAHLE Piston Ring Set Bore File Fit

Other options in this family: MAHLE 4005MS-15 MAHLE 4035MS-15 MAHLE 4065MS MAHLE 3910MS-15 MAHLE 4505MS

Manufacturer

Picture for manufacturer MAHLE

Part Number

4045MS
7 reviews
Sale Price

$104.54

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The MAHLE 4045MS piston ring set is engineered for 4.040" bore applications with a +0.005" oversize and features a file-fit design for precise end gap adjustment. This standard tension ring set uses the proven 1/16", 1/16", 3/16" configuration, making it compatible with a wide range of performance and stock engine builds.

Ring Configuration:

  • Top Ring: Ductile iron construction with plasma moly coating and barrel face profile for superior wear resistance and sealing
  • Second Ring: Cast iron with reverse twist design to control oil and enhance compression sealing
  • Oil Ring: 3-piece standard tension design for optimal oil control

Key Features:

  • 4.040" bore diameter with +0.005" oversize for precision fitting
  • File-fit ends allow custom gap adjustment for your specific application
  • Ultra-flat ring flanks maximize ring-to-piston groove sealing
  • Reduced friction design developed through advanced computer simulation
  • Standard tension for balanced performance and longevity

MAHLE pioneered the use of piston ring simulation and computer development tools to engineer rings that minimize friction and unlock free horsepower. The precision manufacturing ensures consistent performance whether on the dyno or at the track.

Products specifications

Bore (in)

4.040 in.

Bore (mm)

102.616mm

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

I am so pleased! Autoplicity had the best price by far for the item I ordered. I was not familiar with them so having the Paypal option was perfect. Over all I saved $30 on an item that was close to $100. Shipping was VERY reasonable and quick. I ordered my item on Saturday. They shipped it right away and I received it on Wednesday. I am definitely an Autoplicity fan and will recommend them to my friends not to mention our mechanic. He found the item I wanted on sale through another major company. Just to double check, I searched online and Autoplicity blew that company out of the water with their pricing and service for the exact same item. Very nice!

Awesome product And fast fishing

I ordered a WeatherTech cargo liner from Autoplicity after finding the product almost $40 cheaper than anywhere else. Usually I'm suspect of the one company with a very low price but the high number of reviews gave me enough comfort to order. The product came in a large box and was shipped for a very reasonable price and arrived in four business days. The product is as described and I couldn't be happier. I will definately keep them in mind for future orders.

Excellent prices and quick shipping. Will definitely use again.

Fantastic prices and fast shipping!! Looks like I'm done with Jeg's and Summit!!

My first order and I must say, very impressive! Awesome prices and super-fast shipping direct from the manufacturer. Couldn't ask for more! I will return.

WOW SUPER FAST SHIPPING GREAT SERVICE!!!!!!!!

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