My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

MAHLE 4380ML Piston Ring Set File Fit - 4.375 005 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

4380ML
9 reviews
Sale Price

$105.00

Estimated ship date Saturday, November 28

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The MAHLE 4380ML is a file-fit piston ring set designed for high-performance and competition engine builds requiring precise fitment. Sized at 4.375" + .005" overbore, these rings are supplied in a file-fit configuration, allowing the engine builder to custom-fit the end gaps to exact specification for optimal sealing and performance.

Ring Dimensions:

  • Bore Size: 4.375" + .005" oversize
  • Top Compression Ring: 1/16"
  • Second Compression Ring: 1/16"
  • Oil Control Ring: 3/16"
  • Fitment Type: File Fit

Key Features:

  • File-fit design allows custom end-gap tuning for racing or performance applications
  • Manufactured by MAHLE, a globally recognized OEM and aftermarket supplier of engine components
  • Precision tolerances ensure consistent ring seal and reduced blow-by
  • Suitable for custom overbore engine rebuilds requiring exact gap specifications
  • Compatible with a wide range of performance and racing engine applications

MAHLE is a trusted name in OEM and aftermarket engine components, supplying piston rings to both factory manufacturers and professional engine builders worldwide. The 4380ML set is ideal for machine shops and performance builders who demand precise control over ring end-gap during engine assembly.

Products specifications

Bore (in)

4.375 in.

Bore (mm)

111.125mm

File Fit

Yes

Gapless

No

Oil Ring Included

Yes

Oil Ring Material

Stainless steel

Oil Ring Tension

Low

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 had a great experience shopping at autoplicity

This copany shipped my order promptly. I would do business with them again.

Great price found for my product. excellent customer service and my item was in stock.

This is our second order from Autoplicity. The first one didn't go so well due to a mix up with the Sparco seat pricing. Though I was starting to question our decision to order from them after several emails and phone calls and online chats, they came through in the end. These guys earned our second order by honoring the price they had listed and then calling to follow up when our race seat was shipped. Since this group was able turn our bad experience into a positive one we made our second order and, so far, it looks like they are again getting us what we want at the best price we can find. We are happy to recommend Autoplicty and plan on using them for future orders. There is one specific thing we would recommend, change the quality and volume of the hold music on the 800 #. It sounded like we were calling a 1970's van with a blown Jensen stereo turned all the way up,...

Shipped very quickly and had the best price I could find!

Great prices on most things. Ordered on a sunday and they processed and shipped the order the next day.

first order fast shipping and great fit

The whole process was some and quick. They also had the lowest prices available. Will be using them more often for sure!!

This was my first order with Autoplicity and I am very happy. They had the lowest price on-line that I found. Communication was great and shipping was very fast. I ordered late on Thursday and it was at my house the following Tuesday, and I didn't pay for rush shipping. I got exactly what I expected. Will do business with these guys again.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy