BBTV 2C5219 Engine Piston Ring
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BBTV

BBTV 2C5219 Engine Piston Ring

Brand BBTV 2C5219
1st Oil Groove 2
1st Oil Ring Material Steel rail/stainless exp
1st Oil Ring Surface Treatment Chrome
2nd Groove 1.2
2nd Ring Surface Treatment Phosphate
Cylinder Quantity 4
2nd Ring Material Grey iron
Top Ring Material Steel
Engborein 3.917
Engboremetric 99.50
Oversize Std
Top Groove 1.2
Top Ring Surface Treatment Chrome
Fits Subaru · 41 vehicles

Standard bore fit. 99.50 mm sizing for Subaru engine rebuild applications.

Chrome-treated top ring. Surface finish supports wear resistance in the ring pack.

Material-specific design. Steel, grey iron, and stainless components balance sealing and oil control.

Cross-references E1025KC for the same application. See all 1.

$43.35Free shipping
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Free returns within 60 days if it doesn't fit when fitment is verified.
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Engine Piston Ring for Subaru Applications

This engine piston ring is built for Subaru flat-four applications that require standard bore sizing and chrome-treated ring surfaces. It is a direct-fit engine component for select WRX, WRX STI, Impreza, Forester, Legacy, Outback, and Baja models.

Key Features

  • Standard bore size: 99.50 mm / 3.917 in.
  • Chrome-treated top ring surface for wear resistance.
  • Steel top ring construction for consistent sealing performance.
  • Grey iron second ring with phosphate surface treatment.
  • Steel rail and stainless expander oil ring design.

Detailed Description

Part number 2C5219 is an engine piston ring set specification for Subaru engines with a 99.50 mm standard bore. The ring package uses a steel top ring with chrome surface treatment, a grey iron second ring with phosphate treatment, and a steel rail/stainless expander oil ring arrangement. These material and finish choices are used to support cylinder sealing, oil control, and stable ring operation under engine load. Part number 2C5219 also cross-references E1025KC for the same application.

Compatible With Subaru WRX STI, Subaru WRX, Subaru Impreza, Subaru Forester, Subaru Legacy, Subaru Outback, and Subaru Baja applications listed in the fitment data. Fits 2016 Subaru WRX STI, N/A; Fits 2014 Subaru WRX STI, N/A; Fits 2014-2015 Subaru WRX, N/A; Fits 2004-2014 Subaru Impreza, N/A; Fits 2004-2013 Subaru Forester, N/A; Fits 2005-2012 Subaru Legacy, N/A; Fits 2005-2009 Subaru Outback, N/A; Fits 2004-2006 Subaru Baja, N/A.

What It Is Used For

  • Restoring cylinder compression when ring wear has reduced sealing.
  • Reducing oil consumption caused by worn oil control rings.
  • Addressing blow-by from tired piston ring sealing surfaces.
  • Replacing damaged or heat-affected piston rings during engine service.

Installation Notes and Tips

Verify bore size, ring groove dimensions, and engine application before installation. Clean the piston ring grooves thoroughly and confirm ring end gaps against service specifications during assembly. Follow the engine builder’s procedures for ring orientation and break-in.

Quality Assurance

This part is specified with standard bore dimensions and application data for Subaru engine service. Part number 2C5219 cross-references E1025KC for the same application.

This part fits 41 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2016SubaruWRX STI2.5LH4Top Ring Surface Treatment: Chrome
2015SubaruWRX2.5LH4Top Ring Surface Treatment: Chrome
2014SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2014SubaruWRX2.5LH4Top Ring Surface Treatment: Chrome
2014SubaruWRX STI2.5LH4Top Ring Surface Treatment: Chrome
2013SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2013SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2012SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2012SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2012SubaruLegacy2.5LH4Top Ring Surface Treatment: Chrome
2011SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2011SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2011SubaruLegacy2.5LH4Top Ring Surface Treatment: Chrome
2010SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2010SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2010SubaruLegacy2.5LH4Top Ring Surface Treatment: Chrome
2009SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2009SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2009SubaruLegacy2.5LH4Top Ring Surface Treatment: Chrome
2009SubaruOutback2.5LH4Top Ring Surface Treatment: Chrome
2008SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2008SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2008SubaruLegacy2.5LH4Top Ring Surface Treatment: Chrome
2008SubaruOutback2.5LH4Top Ring Surface Treatment: Chrome
2007SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2007SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2007SubaruLegacy2.5LH4Top Ring Surface Treatment: Chrome
2007SubaruOutback2.5LH4Top Ring Surface Treatment: Chrome
2006SubaruBaja2.5LH4Top Ring Surface Treatment: Chrome
2006SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2006SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2006SubaruLegacy2.5LH4Top Ring Surface Treatment: Chrome
2006SubaruOutback2.5LH4Top Ring Surface Treatment: Chrome
2005SubaruBaja2.5LH4Top Ring Surface Treatment: Chrome
2005SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2005SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
2005SubaruLegacy2.5LH4Top Ring Surface Treatment: Chrome
2005SubaruOutback2.5LH4Top Ring Surface Treatment: Chrome
2004SubaruBaja2.5LH4Top Ring Surface Treatment: Chrome
2004SubaruForester2.5LH4Top Ring Surface Treatment: Chrome
2004SubaruImpreza2.5LH4Top Ring Surface Treatment: Chrome
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
E1025KC