Heavy Duty High Boost Valve Spring Set 2003-2010 Ford 6.0L/6.4L Powerstroke XDP Cummins 6.7 Installation instructions are included for

Installation instructions are included for a hassle-free installation

increase flow properties

and other fuel system plumbing

This feature is great for sled pullers who do not want to shift to 4th gear on the track

dust stopping custom pre-filter

Heavy Duty High Boost Valve Spring Set 2003-2010 Ford 6.0L/6.4L Powerstroke XDP Cummins 6.7 Installation instructions are included forThe 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