The Driven Diesel DD-73L-HPX-OBS, sold by Strictly Diesel, is a stainless steel high pressure crossover line for 1994-1997 Ford 7.3L Powerstroke pickups. It links the driver side and passenger side high pressure oil rails so both heads share one balanced oil supply.

Tying the rails together evens out injection control pressure and cuts down the ICP spikes the factory split system can show. Many trucks idle smoother and run a little quieter afterward. The line is the same KCM-built design long sold under the KCM Diesel name.

• Stainless Hard Line: MIL-SPEC stainless tubing and steel fittings stand up to constant 3000 psi pulses.
• Balanced Oil Rails: Shares pressure between both heads for more even injection.
• Fewer ICP Spikes: Steadier pressure for smoother idle and response.
• Pre-Bent Fit: Shaped to clear the stock or drop-in turbo with no bending.
• Head Fittings Included: Two cylinder head fittings come loosely pre-installed.

Technical Specifications

• Part Number: DD-73L-HPX-OBS
• Manufacturer: Driven Diesel
• Material: Stainless steel tube, steel fittings
• Ports Used: Rail plugs over cylinders 4 and 5
• Included: HPX line, 2 head fittings, instructions

Vehicle Fitment & Technical Installation Notes

• Fitment: 1994-1997 Ford F-250/F-350 with the 7.3L Powerstroke and a stock or drop-in turbocharger. Does not fit T4-style turbochargers, and is not needed with a DieselSite Adrenaline HPOP.
• Installation Tip: Work on a cold engine and torque the head fittings to 15-18 ft-lbs at most, since the O-ring does the sealing. Expect the system to purge air over the first 25-50 miles.