XDP XD765 HD Intake Roller Rocker Arm - 1989-1998 5.9L Cummins

The XDP HD Intake Roller Rocker Arm XD765 is a heavy-duty, direct-fit intake rocker arm for 1989-1998 5.9L Cummins diesel engines, built with a roller-tip design and a forced oiling path that feeds the pushrod cup through the adjusting screw. The XD765 is the intake-side rocker arm for 1989-1998 5.9L Cummins engines, built from steel with a roller tip and forced oiling design, and is engineered for use with OEM-style cylinder heads. It is designed to maintain stock rocker ratio and factory valvetrain geometry, not to change how the intake side of the engine runs.

Why the XD765 Is the Right Intake Rocker

The XD765 is the correct heavy-duty replacement for the intake-side rocker arm on a 1989-1998 5.9L Cummins - not the exhaust side, and not a complete engine set. It is built to reduce friction at the pushrod cup through a forced oiling path, while keeping the stock rocker ratio intact so valvetrain geometry stays factory-correct. Backed by a 2-year, unlimited-mileage warranty. If your engine years and cylinder head style match, this is the right intake rocker to order.

Roller Tip Design and Forced Oiling

The XD765 uses a roller tip at the valve contact point instead of a sliding pad, which reduces friction at that contact point during operation. A forced oiling path runs through the tool steel adjusting screw and delivers oil directly into the pushrod cup for improved lubrication and durability.

• Roller tip design reduces friction at the valve contact point.
• Forced oiling feeds the pushrod cup through the adjusting screw.
• Heavy-duty steel construction for the intake-side load path.
• Tool steel adjusting screw for durability under repeated adjustment.
• Stock rocker ratio keeps valvetrain geometry factory-correct.

XD765 Specs at a Glance

The XD765 checks out on all key order-gating specs:

If your engine years and head style match the table above, this is the correct intake rocker to order.

Cross Reference Numbers for XD765

If your current intake rocker arm carries either number below, the XD765 is the confirmed cross reference.

• 3910811
• M-3910811

Avoid These Common Mistakes

Most wrong orders on this part come down to side and year confusion, not the part itself.

• Ordering the XD765 for the exhaust side when only intake is needed.
• Assuming fitment beyond 1989-1998 without confirming your exact engine year.
• Not confirming how many rocker arms are needed for the full intake bank.
• Expecting a rocker ratio change - the XD765 keeps stock geometry.

1989-1998 5.9L Cummins Fitment

Fits 1989-1998 5.9L Cummins diesel engines and is designed for use with OEM-style cylinder heads.

Engine years outside this range are not confirmed for this application - verify your exact engine year before ordering.

For a heavy-duty intake-side rocker arm on a 1989-1998 5.9L Cummins with OEM-style heads, the XD765 is the correct part to order. Confirm your engine years and cylinder head style, then add the XD765 to your order.

Frequently Asked Questions