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 40843CP.060 Plasma-Moly Piston Ring Set 4.420 Bore +.060 Big Block Ford 429/460

(Ford F-150 1975-79, Mustang 1969-71, F-250 1973-79, 1983-93, 1995-96, Thunderbird 1968-76, F-350 1973-79, 1983-93, 1995-97, Galaxie 500 1969-74 + 39 more models)

Manufacturer

Picture for manufacturer MAHLE

Part Number

40843CP.060
11 reviews
Sale Price

$94.01

Estimated ship date Monday, November 23

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 40843CP.060 is a premium Plasma-Moly piston ring set engineered for Big Block Ford 429 and 460 cubic inch engines bored 0.060" over standard, resulting in a 4.420" bore diameter. Manufactured to OE-grade tolerances, this set delivers the performance and durability demanded by professional engine builders and serious rebuilders alike.

Key Features:

  • Bore Size: 4.420" (+0.060" oversize)
  • Material Grade: Premium
  • Upper Compression Ring (UCR): Cast Iron with Plasma-Moly facing — barrel-faced contact area for efficient sealing and reduced blow-by
  • Lower Compression Ring (LCR): Cast Iron with reverse twist design and taper race machining for superior groove side sealing
  • Oil Control Ring (OCR): Stainless Steel with Chrome facing — CP-20 design featuring a 20-degree ear angle for optimal cylinder wall side sealing
  • Axial Heights: UCR — 5/64", LCR — 5/64", OCR — 3/16"
  • Ring Types: UCR: RF-10PF | LCR: RBT-10 | OCR: CP-20
  • CNC-controlled gap chamfer optimizes compression and minimizes blow-by
  • CP-20 oil ring expander features a special chemical polish for enhanced oil drain back
  • Pre-lapped for immediate seating — virtually eliminates engine break-in time
  • Ring tension, materials, and coatings optimized for reduced friction and extended service life
  • Sold as a complete set for one 8-cylinder engine

MAHLE Original piston ring sets are trusted by professional engine builders worldwide. The 40843CP.060 is the ideal choice for an oversize rebuild of the legendary Ford 429/460 big block engine, providing a direct-fit, installer-friendly solution with premium materials and proven technology.

Products specifications

Fits

Ford F-150 1975-79, Mustang 1969-71, F-250 1973-79, 1983-93, 1995-96, Thunderbird 1968-76, F-350 1973-79, 1983-93, 1995-97, Galaxie 500 1969-74, F-100 1973-77, 1979, F-250 Pickup 1973-74, Fairlane 1970, Ranchero 1970-77 + 35 more models

Piston Ring Size

.060IN

Piston Ring Type

Premium

very easy page to navigate and great price, I ordered a second shipment of the same item, best price in town, thanks.

Quick, easy and accurate!

Easy to shop

Great price and selection. Good communication after the sale. Fast shipping. Will shop here again for my next purchase.

My shopping experience is top notch. You actually had the brand I really wanted. the only real issue is shipping, didn't get a tracking number like promised items just showed up.

Easy to order

Ordered a set of 5 steel wheels, distributor messed up and only sent me 4. 5th wheel is taking a good couple weeks to arrive due to the distributor messing up the shipment. Autoplicity did make things right and I can honestly say now I would recommend them.

Shipped ultra fast and had great prices!

It was easy and a painless shopping experience

This is definitely a great company I had questions about my order and it will prompt you get right back to me. I'm extremely pleased with the purchase that I have made through this company

I did a price comparison for hard-to-find Redline motor and tranmission oil of over 30 different vendors and websites through Amazon, E-bay, Google, etc. and Autoplicity had the best price by 25-30%. It was a no-brainer to order from them, and their website is easy search and manage. And their shipping charges aren't too bad either.

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