The XDP Heavy Duty High Boost Valve Spring Set XD388 is an essential upgrade to strengthen and gain control of the valvetrain on your 2003-2010 Ford 6.0L/6.4L Powerstroke. These valve springs deliver improved valve control over a factory valve spring with increased spring pressure to minimize valve float.
Each spring endures a stress relief process and is computer load mapped to provide a high-quality product with long-term durability. Tested within 1 lb of seat pressure, the XD388 comes as a complete set and includes XDP's 1-year unlimited mileage warranty. Valve springs only, this set re-uses your factory retainers and locks.
Features:
- Set of 32 Springs
- 100 Lb. Seat Pressure
- Performance Valve Spring Kit
- Essential For Elevated Boost Levels
- 1-Year Unlimited Mileage Warranty
Specifications:
- Installed Height: 1.830 inch
- Installed Pressure: 90lbs
- 100Lbs at .800 inch
- 252Lbs at 1.250 inch
- Coil Bind: 1.14 inch
Power Stroke 6.4L
Vehicles
- 2004-2005 Ford Excursion Eddie Bauer
- 2004-2005 Ford Excursion Limited
- 2004-2005 Ford Excursion XLS
- 2004-2005 Ford Excursion XLT
- 2004-2010 Ford F-250 Super Duty Harley-Davidson Edition
- 2004-2010 Ford F-250 Super Duty King Ranch
- 2004-2010 Ford F-250 Super Duty Lariat
- 2004-2010 Ford F-250 Super Duty XL
- 2004-2010 Ford F-250 Super Duty XLT
- 2004-2010 Ford F-350 Super Duty Harley-Davidson Edition
- 2004-2010 Ford F-350 Super Duty King Ranch
- 2004-2010 Ford F-350 Super Duty Lariat
- 2004-2010 Ford F-350 Super Duty XL
- 2004-2010 Ford F-350 Super Duty XLT
- 2004-2010 Ford F-450 Super Duty Lariat
- 2004-2010 Ford F-450 Super Duty XL
- 2004-2010 Ford F-450 Super Duty XLT
- 2008-2009 Ford F-250 Super Duty FX4
- 2008-2009 Ford F-350 Super Duty FX4
- 2008-2010 Ford F-450 Super Duty King Ranch
- 2009-2010 Ford F-250 Super Duty Cabela's
- 2009-2010 Ford F-350 Super Duty Cabela's
- 2009-2010 Ford F-450 Super Duty Harley-Davidson Edition
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.