Mahle 42101CP OE Piston Ring Set STD for GM 2.4L Ecotec I4 LE5 LE9 LAF LEA LUK

Vehicle Fitment

• 2006-2011 Chevrolet HHR (2.4L DOHC Ecotec I4, LE5 / LE9)
• 2008-2012 Chevrolet Malibu (2.4L DOHC Ecotec I4, LE5 / LE9)
• 2010-2017 Chevrolet Equinox (2.4L DOHC Ecotec I4, LAF / LEA / LAT / LUK)
• 2012-2015 Chevrolet Captiva Sport (2.4L DOHC Ecotec I4, LAF / LEA)
• 2013-2014 Chevrolet Malibu Eco (2.4L DOHC Ecotec I4, LAT / LUK, eAssist)
• 2010-2017 GMC Terrain (2.4L DOHC Ecotec I4, LAF / LEA / LAT / LUK)
• 2010-2016 Buick LaCrosse (2.4L DOHC Ecotec I4, LAF / LAT / LUK)
• 2011-2017 Buick Regal (2.4L DOHC Ecotec I4, LAF / LEA / LAT / LUK)
• 2012-2017 Buick Verano (2.4L DOHC Ecotec I4, LAF / LEA)
• 2013-2016 Cadillac ATS (2.4L DOHC Ecotec I4, LAF / LEA)
• 2017 Buick Envision (2.4L DOHC Ecotec I4, LEA)
• 2007-2010 Saturn Aura / Vue Green Line Hybrid (2.4L DOHC Ecotec I4, LE5)
• 2007-2010 Pontiac G6 / Solstice (2.4L DOHC Ecotec I4, LE5)

Fitment Notes

• Standard bore (STD) - for use with an unmodified 3.464" (87.986mm / 88.0mm) cylinder bore only; oversize variants available (.010 = 42101CP.010, .020 = 42101CP.020, .030 = 42101CP.030)
• Fits all naturally aspirated GM 2.4L DOHC Ecotec variants: LE5, LE9 (E85/FlexFuel), LAF, LEA (FlexFuel), LAT, and LUK (eAssist/mild hybrid); confirm engine code before ordering
• Does not fit the turbocharged Ecotec variants (LNF, LHU, LDK) used in the Cobalt SS, Solstice GXP, and Sky Redline; those require a different ring set
• Verify VIN (8th character) and engine code to confirm correct application before ordering

Features

• Chrome-faced carbon steel top compression ring for reliable combustion sealing and extended wear life in the Ecotec's aluminum cylinder bores
• Cast iron second compression ring with reverse-twist design for effective groove-side sealing and controlled oil migration on both strokes
• CP-20 three-piece stainless steel oil control ring assembly with an exclusive 20-degree ear angle for optimal side seal within the piston oil ring groove
• Pre-lapped ring faces seat immediately upon installation, eliminating extended break-in time and restoring compression quickly
• CNC-controlled gap chamfer on compression rings optimizes blow-by reduction and compression retention across the Ecotec's operating range
• Shallow groove oil ring design matches OE piston specifications for precise fitment

Specifications

• Engine: GM 2.4L DOHC Ecotec I4 (LE5, LE9, LAF, LEA, LAT, LUK - 16-valve)
• Bore Diameter: 3.464" (87.986mm) - Standard (STD)
• Top Ring Thickness: 1.2mm
• Top Ring Material: Carbon steel, chrome-faced
• Second Ring Thickness: 1.5mm
• Second Ring Material: Cast iron, reverse-twist
• Oil Ring Thickness: 2.5mm
• Oil Ring Type: CP-20 three-piece, stainless steel expander, chrome-faced rails
• Oil Ring Groove: Shallow groove
• Oversize: Standard (STD) - oversize variants available (.010, .020, .030)
• Cylinder Count: 4-cylinder set (4 complete ring sets per package)

Included Components

• 4x Chrome-faced carbon steel top compression rings (1.2mm)
• 4x Reverse-twist cast iron second compression rings (1.5mm)
• 4x CP-20 three-piece stainless steel oil control ring assemblies (2.5mm)

Product Description

The MAHLE 42101CP is an OE-replacement piston ring set designed for the GM 2.4L DOHC Ecotec inline-four in standard bore (3.464" / 87.986mm), covering a broad range of Chevrolet, GMC, Buick, Cadillac, Saturn, and Pontiac vehicles from 2006 through 2017. The 42101CP spans all naturally aspirated 2.4L Ecotec variants - LE5, LE9 (E85 FlexFuel), LAF, LEA, LAT, and LUK (eAssist mild hybrid) - making it the go-to ring set for engine rebuilds across GM's most widely used compact and midsize four-cylinder platform. The chrome-faced top ring, reverse-twist second ring, and CP-20 oil control ring assembly work together to restore compression, reduce oil consumption, and eliminate blow-by to factory levels.

Built to MAHLE's OE form, fit, and function standards, this ring set features pre-lapped faces for fast seating, a shallow groove oil ring design matched to OE piston specifications, and CNC-controlled gap chamfer on both compression rings for maximum sealing efficiency. It is sold at standard bore for unmodified cylinders; oversize variants (.010, .020, .030) are available under suffixed part numbers for re-bored applications. Note that this ring set does not fit the turbocharged Ecotec variants (LNF, LHU, LDK) - those require a separate application-specific ring set.