Sinister Diesel Blue Spring Kit with Adjustable Billet Gray Housing 03-07 6.0L Ford Powerstroke

NOTE: NOT FOR SALE IN CALIFORNIA

Restore proper fuel pressure and performance to your Ford F-250 / F-350 Super Duty equipped with the 6.0L Power Stroke with this upgraded Blue Spring Kit . Now available in Adjustable and Non-Adjustable options to fit your specific needs.

This simple 30-minute installation can bring fuel pressure back to factory spec, with most 6.0L trucks seeing an increase of up to 10 PSI. Restoring proper fuel pressure helps prevent injectors from out-flowing the stock fuel pump, reducing the risk of aeration and significantly extending injector life. Many owners notice smoother idle, quicker throttle response, and improved turbo spool-up after installation.

Choose the Option That Fits Your Build

Non-Adjustable Version

• Pre-set to deliver improved factory-style fuel pressure
• Ideal for stock or mildly modified trucks
• Simple, reliable performance upgrade with no tuning required

Adjustable Version

• Features an integrated adjustment screw for fine-tuning fuel pressure
• Perfect for trucks running larger injectors or performance modifications
• Allows you to compensate for spring wear over time by making quick adjustments
• Recommended fuel pressure setting: 55–68 PSI

Upgraded Billet Spring Housing

Both versions include a brand-new billet aluminum regulator housing designed to:

• Maintain consistent spring pressure
• Prevent leaks commonly seen with the factory cast aluminum housing
• Eliminate the common “weep” issue from the OEM unit
• Provide thicker, stronger billet construction for long-term durability
• Clean up the appearance of your factory fuel filter housing

If you’re looking to protect your injectors, restore lost performance, and upgrade a known weak point on the 6.0L Power Stroke, this Blue Spring Kit delivers dependable results with the option of added adjustability for performance builds.