labwork Valve Seal 12482063 313 X 500 Metal Clad Replacement for LS1 LS2 LS6 4.8 5.3 5.7 6.0

Key Features & Technical Advantages

• Precision Oil Control Sealing: Formulated to maintain precise oil metering down the valve stems, preventing oil consumption, blue tailpipe smoke, and carbon buildup on valves.

• High-Temperature Vulcanized Rubber: Engineered with premium heat-resistant elastomer compounds designed to withstand extreme combustion temperatures without hardening or cracking.

• Exact OEM Dimensions: Manufactured to fit GM LS-series engines with 0.313" valve stems and valve guides machined to a 0.500" guide boss diameter.

• Complete V8 Engine Kit: Includes color-coded or structurally differentiated intake and exhaust seals for a full, hassle-free engine head refresh.

Crucial Fitment & Technical Notice

Please Read Before Purchasing: Measure your valve stem and valve guide boss diameters before ordering. This set is specifically designed for GM Gen III/IV V8 engines featuring 0.313" valve stems and 0.500" guide bosses.

Official Application Matrix (GM LS-Series V8 Engines)

Chevrolet Models

• Avalanche: 4.8L / 5.3L / 6.0L V8 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013

• Camaro SS: 6.2L LS3 V8 | 2010, 2011, 2012, 2013, 2014, 2015

• Corvette C5: 5.7L LS1 V8 | 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

• Corvette C5 Z06: 5.7L LS6 V8 | 2001, 2002, 2003, 2004

• Corvette C6: 6.2L LS3 V8 | 2008, 2009, 2010, 2011, 2012, 2013

• Express 2500 / 3500: 6.0L V8 | 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020

• Silverado 1500 / 2500 / 3500: 4.8L / 5.3L / 6.0L V8 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013

• SS Sedan: 6.2L LS3 V8 | 2014, 2015, 2016, 2017

• Tahoe / Suburban: 4.8L / 5.3L / 6.0L V8 | 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014

• Trailblazer SS: 6.0L LS2 V8 | 2006, 2007, 2008, 2009

GMC Models

• Savana 2500 / 3500: 6.0L V8 | 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020

• Sierra 1500 / 2500 / 3500: 4.8L / 5.3L / 6.0L V8 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013

• Yukon / Yukon XL: 4.8L / 5.3L / 6.0L / 6.2L V8 | 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014

Cadillac Models

• CTS-V: 5.7L LS6 V8 | 2004, 2005

• Escalade / Escalade ESV & EXT: 5.3L / 6.0L / 6.2L V8 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014

Pontiac Models

• Firebird / Trans Am: 5.7L LS1 V8 | 1998, 1999, 2000, 2001, 2002

• GTO: 5.7L LS1 V8 (2004) / 6.0L LS2 V8 (2005) | 2004, 2005

Hummer Models

• H2: 6.0L LQ4 V8 | 2003, 2004, 2005, 2006, 2007, 2008, 2009

Critical Non-Compatibility Warning

• Valve Stem & Boss Dimensions Alert: Will NOT fit early 1997–2001 LS engines that feature non-hat single-piece valve stem seals, nor aftermarket heads with 11/32" or 3/8" valve stems or custom .530" guide bosses. Always verify your cylinder head's valve stem and guide boss specs prior to purchase.

Product Specifications

• Part Type: Engine Valve Stem Seals Set

• OEM Cross-Reference Part Number: 12482063

• Valve Stem Diameter: 0.313 in (7.95 mm)

• Guide Boss Outer Diameter: 0.500 in (12.7 mm)

• Engine Family: GM Gen III / IV V8 (LS / Vortec Series)

• Fitment Type: Direct OEM Replacement

• Condition: 100% Brand New

Package Includes

• 8 x Intake Valve Stem Seals

• 8 x Exhaust Valve Stem Seals

Important Installation Notes

• Use Valve Stem Protectors: Always place protective plastic sleeves over the valve keeper grooves during installation to prevent slicing or tearing the internal sealing lip.

• Proper Seating: Lubricate seals with clean engine oil and use a dedicated valve seal driver tool to push seals down onto the guide boss until fully seated.