The Strictly Diesel DD-73L-HPX-SD is a high-pressure oil crossover for a 1999–2003 7.3 Powerstroke. It ties the driver and passenger oil rails together with a pre-bent stainless line.

The factory system feeds each head from its own hose. A spike on one side does not equalize. This line uses the rail plugs over cylinders 5 and 6, just ahead of the turbo, so both rails share pressure. Strictly Diesel ships the ferrules already crimped. Two O-ring boss fittings are in the kit. Torque those fittings to 15–18 lb-ft. The O-ring does the sealing. More than that can strip the head.

It fits 1999–2003 pickups and Excursions with a stock or drop-in turbo. It will not clear a T4 housing. A 1994–1997 OBS does not have these rail plugs.

Fitment

• 1999–2003 Ford 7.3L Powerstroke
• F-Series and Excursion
• Stainless crossover and two head fittings
• Torque 15–18 lb-ft
• Stock or drop-in turbo only
• Does not fit a T4 turbo or 1994–1997
• Does not fit KC Turbos Gen3 upgrade Turbos

It does not add oil volume. A weak HPOP or a bad IPR will still show up. This only balances the two rails.