CUMMINS 3909696 fuel injector return manifold, 3909696 injector return line, first gen 5.9 Cummins 12-valve fuel return, VE pump injector return manifold, genuine Cummins fuel manifold 3909696, 1989-1993 Dodge Ram Cummins fuel return line.

CUMMINS 3909696 OEM FUEL INJECTOR RETURN MANIFOLD (RETURN LINE) – 5.9L CUMMINS 12V (1989–1993)

The Cummins 3909696 fuel injector return manifold is the OE hard line that collects excess fuel from all six injectors and routes it back to the return tee on your first-gen 5.9L Cummins 12-valve. Instead of piecing together rubber hose that can crack, leak, and introduce air, this genuine Cummins manifold restores the factory-engineered routing and sealing the truck left the plant with. 

Key Features

• Genuine Cummins 3909696 fuel injector return manifold / return line (no aftermarket casting).
• Direct-fit for 1989–1993 Dodge/Ram 2500 & 3500 with 5.9L 12-valve Cummins (VE rotary pump).
• Pre-bent OE hard line maintains correct injector spacing and banjo orientation to reduce leak points.
• Designed to work with OEM banjo bolts and sealing washers for a complete, all-Cummins repair. 
• Backed by Cummins engineering for durability against under-hood heat and vibration.

Verified Fitment

This part is primarily used on B-series 5.9L engines and is the OE return manifold for first-gen Dodge/Ram trucks with the VE pump.

Also used on various non-certified 5.9L B-series and related industrial/medium-duty applications; always verify by ESN for non-automotive engines. 

Cross-Reference & Related Cummins Parts (All Genuine Cummins)

Build a complete OEM fuel return system with these Cummins parts available at CPP Diesel:

• CUMMINS 3905307 OEM FUEL INJECTOR RETURN LINE BANJO BOLT – 5.9L 12-VALVE (1989–1998) – Six required per engine for the injector return manifold banjo connections.
• CUMMINS 3900808 OEM 9MM FUEL INJECTOR SEALING WASHER – 5.9L CUMMINS (1989–1991) – OEM copper injector washers for early 9 mm injectors. 
• CUMMINS 3918188 OEM 8MM FUEL SYSTEM SEALING WASHER – RAM 5.9L (1989–1998) – Used on multiple injector return and bleed fittings; pair with this manifold for a leak-free refresh. 
• CUMMINS 3924726 OEM FUEL RETURN CHECK VALVE – RAM 5.9L 12V (1989–1998) – Filter-head mounted return check valve that works with the injector return system. 
• CUMMINS 3282437 OEM AFC BOOST REFERENCE HOSE (AIR FUEL CONTROL TUBE) – 5.9L 12V (1989–1993) – VE pump AFC boost reference line, commonly serviced along with return and overflow lines. 
• CUMMINS 3925860 OEM FUEL INJECTION PUMP RETURN LINE (FUEL DRAIN TUBE) – DODGE 5.9L 12V (1991.5–1993) – VE pump drain/overflow line that ties into the return circuit. 
• CUMMINS 3905707 OEM VE INJECTION PUMP FUEL RETURN LINE (OVERFLOW/DRAIN) – 5.9L (1989–1991 NON-INTERCOOLED) – Early non-intercooled VE overflow/return line that shares the same return tee. 

What You Get

• (1) Genuine Cummins fuel injector return manifold (P/N 3909696).
• Banjo bolts, sealing washers, and related hardware sold separately (see related Cummins parts above).

Installation Notes

• Carefully remove the old manifold; aged lines often crack when disturbed.
• Install with new OEM banjo bolts and copper sealing washers for each injector connection.
• Torque all banjo bolts to factory spec and re-check for leaks after warm-up.
• If the system was contaminated, flush the fuel system and replace the fuel filter before returning the truck to service. 

FAQ

WILL THIS FIT MY 1989–1993 5.9L CUMMINS?
Yes. Cummins 3909696 is the OE injector return manifold for 1989–1993 Dodge/Ram 2500/3500 trucks with the 5.9L 12-valve Cummins and Bosch VE rotary injection pump. Always confirm against your VIN/ESN if you are unsure or working on an industrial engine.

DOES THIS INCLUDE BANJO BOLTS AND SEALING WASHERS?
No. This listing is for the hard return manifold only. Order Cummins 3905307 banjo bolts (six required) plus the correct sealing washers (such as Cummins 3900808 or 3918188 depending on your injector/connection size) to complete the job. 

WHAT ARE THE COMMON CROSS-REFERENCE NUMBERS FOR THIS PART?
Cummins documentation and distributor catalogs commonly list 3913930 as an alternate identifier for this manifold, and show earlier superseded part numbers 3905117 and 3905691 in the same family. Use 3909696 as the current service part, and always verify by engine serial number for non-automotive applications. 

IS THIS AN OEM CUMMINS PART OR AFTERMARKET?
This is a 100% genuine Cummins component sourced through CPP Diesel, not an aftermarket copy. That means OE tubing, bends, and fittings for proper fuel routing and long-term durability.

WILL THIS WORK ON 1994–1998 12-VALVE OR LATER COMMON-RAIL TRUCKS?
No. Second-gen 12-valve (P7100) and all later common-rail 5.9L/6.7L engines use different return line configurations. For those engines, use the application-specific Cummins return lines and hardware listed in the appropriate CPP Diesel category. 

Specifications for cummins 3909696