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

Shop engine parts, oil catch cans, engine cooling upgrades, thermostats, thermostat housings, radiators, coolant accessories, supercharger pulleys, idler pulleys, tensioner pulleys, throttle bodies, engine covers, fuse box covers, cap covers, valve covers, oil system parts, ignition parts, sensors, gaskets, fuel delivery parts, and engine bay dress-up accessories at Black Ops Auto Works. This collection is built for performance vehicles, trucks, SUVs, muscle cars, boosted builds, HEMI platforms, Hellcat builds, Trackhawk SUVs, RAM TRX trucks, LS-powered builds, and high-horsepower street or track applications. Whether you are improving oil control, reducing heat soak, upgrading cooling, supporting higher boost, cleaning up the engine bay, replacing worn engine components, or preparing a street car for harder driving, this collection helps you shop engine parts by brand, category, vehicle platform, and performance goal. Shop Engine Parts by Category Browse engine upgrades and replace...

A properly designed fuel delivery system is the backbone of any high-performance engine build, ensuring the injectors or carburetor receive a consistent supply of fuel at the correct pressure regardless of engine load, RPM, or fuel demand. From factory replacement pumps keeping daily drivers on the road to high-flow in-tank modules supporting 1000-horsepower builds, the right fuel delivery components prevent lean conditions, injector damage, and fuel starvation at the worst possible moment. Modern EFI systems are particularly sensitive to fuel pressure variation, with even small drops causing misfires and power loss under hard acceleration. Whether you are restoring a factory system or engineering a purpose-built race setup, matching pump flow rate and fuel pressure regulation to your injector and engine requirements is essential. Popular Upgrades Top-selling fuel delivery components include Aeromotive Phantom in-tank fuel pump kits that retrofit into factory tanks without custom fa...

A fuel pressure regulator maintains consistent rail or bowl pressure regardless of engine demand, fuel pump output variation, or manifold vacuum changes, acting as the pressure control valve that determines how much fuel the injectors or carburetor actually sees at any given moment. In return-style EFI systems, the regulator bleeds excess fuel back to the tank while holding the supply side at a precise setpoint, typically 43.5 PSI for most port EFI applications. In boost-referenced setups, the regulator increases fuel pressure proportionally with boost pressure to maintain a constant fuel-to-air pressure differential as manifold pressure rises, preventing the injector effective flow rate from dropping under boost. Selecting the correct regulator type, pressure range, and port sizing for your system determines how accurately fuel delivery tracks engine demand across the full operating envelope. Popular Upgrades Top-selling fuel pressure regulators include the Aeromotive 13129 adjusta...

At Sinister Diesel, we design and manufacture top-tier parts engineered for durability and precision. Our products—including coolant filtration kits, oil filtration kits, fuel filtration kits, intercooler pipes, headers, up-pipes, cold air intakes, and more—are built to enhance the power, efficiency, and longevity of your diesel engine. Whether you’re driving a Powerstroke, Cummins, or Duramax, our USA-made parts are crafted to meet the highest performance standards. Trusted by Diesel Enthusiasts Nationwide We’re honored to have earned thousands of 5-star Google reviews from loyal customers who trust Sinister Diesel for their trucks. Our outstanding reputation reflects our unwavering commitment to quality and customer satisfaction. Every product we create undergoes rigorous testing to ensure it meets the demands of both everyday drivers and performance enthusiasts. Customer Service You Can Count On At Sinister Diesel, we believe our customers deserve the best—not just in the...