Mahle 41787CP.020 OE Plasma-Moly Ring Set .020 for Ford 5.4L Triton 2V SOHC V8

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Product Specification:

SKU:MHL41787CP.020

MPN: 41787CP.020

UPC: 027067464873

Weight: 0.7 lb

Inventory: 18

Type: Piston Rings

Vehicle Fitment

1999-2007 Ford F-150 (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)
1999-2005 Ford F-250 Super Duty (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)
1999-2005 Ford F-350 Super Duty (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)
1999-2005 Ford Excursion (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)
1999-2006 Ford Expedition (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)
1999-2002 Ford E-150 Econoline (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)
1999-2007 Ford E-250 (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)
1999-2007 Ford E-350 Club Wagon / Super Duty (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)
1999-2002 Lincoln Navigator (All Trims, 5.4L SOHC 2V Triton V8, VIN Code L)

Fitment Notes

.020" oversize - for use only on engines with cylinders bored to .020" over standard; verify bore measurement before ordering
Fits VIN code "L" (5.4L SOHC 2V Triton) only; not compatible with VIN "5" (5.4L SOHC 3V) or VIN "A" (5.4L DOHC 4V) Triton variants
Confirm bore diameter with a bore gauge before ordering; do not install on a standard-bore engine
For standard bore applications, order base part number 41787CP (no suffix)

Features

Plasma-moly inlaid top compression ring (RF-13PF) for superior wear resistance and efficient combustion sealing in the Ford Triton's high-output operating environment
THM-13 tapered hook groove second ring acts as a check valve to relieve combustion pressure buildup beneath the top ring, stabilizing sealing and reducing power loss
CP-20 three-piece oil control ring with an exclusive 20-degree ear angle for the best possible side seal within the piston oil ring groove
Shallow oil ring groove design matches OE specifications for proper fit without machining
Pre-lapped ring faces seat immediately, virtually eliminating extended break-in time
CNC-controlled gap chamfer on compression rings optimizes blow-by reduction and compression retention

Specifications

Engine: Ford 5.4L SOHC 2V Triton V8 (330 cu. in., VIN Code L, 16-valve)
Bore Diameter: .020" oversize (standard bore 3.552" / 90.24mm)
Top Ring Thickness: 1.5mm
Top Ring Type: RF-13PF (plasma-moly inlaid cast iron)
Second Ring Thickness: 1.5mm
Second Ring Type: THM-13 (tapered hook groove)
Oil Ring Thickness: 3.0mm
Oil Ring Type: CP-20 three-piece, stainless steel expander, chrome-faced rails
Oil Ring Groove: Shallow groove
Oversize: .020" - oversize variants also available (.010 = 41787CP.010, .030 = 41787CP.030)
Cylinder Count: V8 (8 complete ring sets per package)

Included Components

8x Plasma-moly cast iron top compression rings (1.5mm, RF-13PF)
8x Tapered hook groove second compression rings (1.5mm, THM-13)
8x CP-20 three-piece oil control ring assemblies (3.0mm)

Product Description

The MAHLE 41787CP.020 is an OE-replacement premium piston ring set engineered for the Ford 5.4L SOHC 2V Triton V8 (VIN code L) at .020" oversize, covering a wide range of Ford F-series trucks, Expedition, E-series vans, and Lincoln Navigator models from 1999 through 2007. Built to MAHLE's OE form, fit, and function standards, this ring set restores compression, reduces oil consumption, and brings blow-by back to factory-specification levels - making it the go-to choice for engine rebuilds on bored 5.4L 2V applications.

The plasma-moly RF-13PF top ring delivers reliable combustion sealing and excellent break-in characteristics under the Triton's demanding duty cycles. The THM-13 tapered hook groove second ring actively manages combustion pressure beneath the top ring, maintaining top ring stability and improving sealing efficiency. The CP-20 oil control ring with its exclusive 20-degree ear angle provides the best possible side seal within the oil ring groove and simplifies installation. Other oversize options are available in .010" (41787CP.010) and .030" (41787CP.030); the base part number 41787CP covers standard bore applications.