XDP Xtreme Diesel Performance | SKU: XD386

Performance Valve Springs and Retainer Kit

Regular price $649.95

The XDP Performance Valve Springs and Retainer Kit XD386 are a perfect upgrade for your modified 2001-2016 GM 6.6L Duramax. Camshaft upgrades and other modifications that increase boost require more valve control.

The XDP Performance Valve Spring feature a conical design for better valve control than a standard straight spring. The conical design also allows for smaller and lighter spring retainers. Each spring undergoes a stress relief process and is computer load mapped, to ensure quality and long-term reliability.

Each spring is matched within 1 lb of seat pressure to ensure consistency. Sold as a complete set with valve springs, retainers, and locks. Each kit is backed by XDP's 1-year unlimited mileage warranty.
Features:

  • 125 Lb. Seat Pressure
  • Conical Spring Design
  • Performance Valve Spring Kit
  • Essential For Elevated Boost Levels
  • Complete Set (Springs, Locks and Retainers)

Specifications:

  • Installed Height: 1.610 inch
  • Installed Pressure: 125lbs
  • 210lbs at 1.110 inch
  • Coil Bind: 1.050 inch
Duramax L5P
Duramax LB7
Duramax LBZ
Duramax LLY
Duramax LML
Duramax LMM
Vehicles
  • 2001-2002 GMC Sierra 2500 HD SL
  • 2001-2002 GMC Sierra 3500 SL
  • 2001-2005 Chevrolet Silverado 2500 HD
  • 2001-2005 Chevrolet Silverado 3500
  • 2001-2006 Chevrolet Silverado 2500 HD LS
  • 2001-2006 Chevrolet Silverado 3500 LS
  • 2001-2006 Chevrolet Silverado 3500 LT
  • 2001-2006 GMC Sierra 3500 SLE
  • 2001-2006 GMC Sierra 3500 SLT
  • 2001-2016 Chevrolet Silverado 2500 HD LT
  • 2001-2016 GMC Sierra 2500 HD SLE
  • 2001-2016 GMC Sierra 2500 HD SLT
  • 2002-2005 GMC Sierra 2500 HD
  • 2002-2005 GMC Sierra 3500
  • 2003-2014 GMC Sierra 2500 HD WT
  • 2004-2004 Chevrolet Silverado 3500 WT
  • 2004-2006 GMC Sierra 3500 WT
  • 2004-2016 Chevrolet Silverado 2500 HD WT
  • 2006-2006 Chevrolet Silverado 3500 WT
  • 2006-2006 GMC Sierra 2500 HD SL
  • 2006-2006 GMC Sierra 3500 SL
  • 2007-2007 Chevrolet Silverado 2500 HD Classic LS
  • 2007-2007 Chevrolet Silverado 2500 HD Classic LT
  • 2007-2007 Chevrolet Silverado 2500 HD Classic WT
  • 2007-2007 Chevrolet Silverado 3500 Classic LS
  • 2007-2007 Chevrolet Silverado 3500 Classic LT
  • 2007-2007 Chevrolet Silverado 3500 Classic WT
  • 2007-2007 GMC Sierra 2500 HD Classic SL
  • 2007-2007 GMC Sierra 2500 HD Classic SLE
  • 2007-2007 GMC Sierra 2500 HD Classic SLT
  • 2007-2007 GMC Sierra 2500 HD Classic WT
  • 2007-2007 GMC Sierra 3500 Classic SL
  • 2007-2007 GMC Sierra 3500 Classic SLE
  • 2007-2007 GMC Sierra 3500 Classic SLT
  • 2007-2007 GMC Sierra 3500 Classic WT
  • 2007-2014 GMC Sierra 3500 HD WT
  • 2007-2016 Chevrolet Silverado 2500 HD LTZ
  • 2007-2016 Chevrolet Silverado 3500 HD LT
  • 2007-2016 Chevrolet Silverado 3500 HD LTZ
  • 2007-2016 Chevrolet Silverado 3500 HD WT
  • 2007-2016 GMC Sierra 3500 HD SLE
  • 2007-2016 GMC Sierra 3500 HD SLT
  • 2011-2016 GMC Sierra 2500 HD Denali
  • 2011-2016 GMC Sierra 3500 HD Denali
  • 2015-2016 Chevrolet Silverado 2500 HD High Country
  • 2015-2016 Chevrolet Silverado 3500 HD High Country
  • 2015-2016 GMC Sierra 2500 HD
  • 2015-2016 GMC Sierra 3500 HD

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.