If you own a 1998.5 to 2003 7.3L Ford Powerstroke, you already know the HEUI injection system relies heavily on oil pressure to fire those fuel injectors. At the center of that system sits the High-Pressure Oil Pump (HPOP) reservoir, a component crucial for keeping oil fed directly to the pump.

Unfortunately, the factory cast aluminum reservoirs haven't aged well. After decades of heat cycles and thousands of miles, OEM reservoirs commonly suffer from porous casting leaks, stripped mounting threads, and warped sealing surfaces.

To solve these common failure points once and for all, we designed and built the CNC Fab Billet HPOP Reservoir.

The Problem with the Factory Cast Reservoir

The original equipment reservoir is made from die-cast aluminum. While it worked fine off the dealership lot decades ago, age exposes its flaws:

1. Material Porosity: Over time, engine oil can leak straight through microscopic pores in the cast aluminum, leaving an annoying oil sheen on top of your engine valley.

2. Weak Threads: Threaded ports for sensors and oil lines in cast aluminum are prone to stripping during routine service or performance upgrades.

3. Warping & Sealing Failures: Years of extreme heat cycles cause the mating surfaces to warp, leading to oil leaks around the base gasket that are notoriously frustrating to seal.

Why Upgrade to Billet Aluminum?

We engineered our billet reservoir right here in-house to directly address these factory shortcomings while offering a clean, custom aesthetic under the hood.

• Aircraft-Grade Billet Construction: Machined from solid billet aluminum stock, eliminating porosity issues entirely.

• Superior Thread Engagement: Precision-tapped threads hold up against repeated maintenance without the risk of stripping out.

• Flawless Mating Surface: Ultra-flat machined sealing surfaces prevent oil weep and ensure a long-lasting, leak-free seal.

• Direct OEM Replacement: Fits seamlessly on 1998.5 (Late '98) through 2003 7.3L Powerstrokes.

Choose Your Finish

Every engine bay is different, which is why we offer the CNC Fab Billet HPOP Reservoir in four distinct finishes:

Summary & Availability

If you're fixing a persistent oil leak in the valley or building a bulletproof 7.3L engine bay, upgrading to our billet reservoir is one of the smartest upgrades you can make.

The CNC Fab Billet HPOP Reservoir is available now. Click here to learn more. 

***This will also fit the 1996 & 1997 models as well, but you will need to purchase the HPOP cover for proper fitment.***