DDP Stage 4 Injectors | 1994-1998 5.9L 12V Cummins 900HP

Q: Can I run Stage 4 injectors on a street truck?

No. Stage 4 injectors are primarily intended for off-road use due to excessive smoke output. For regular street use, Stage 3 is the largest injector set Dynomite recommends.

Q: What is the difference between Stage 3 and Stage 4?

Stage 3 supports 700-750 RWHP and is the largest street-use set. Stage 4 supports 850-900 RWHP (900+ with a 13mm P-pump), is off-road only due to smoke output, flows 63 LPM vs Stage 3's 56 LPM, and requires a heavily modified P-pump vs a modified P-pump.

Q: What timing do DDP9498-4 Stage 4 injectors require?

Dynomite Diesel recommends 23-28 degrees timing for Stage 4 - the widest window in the lineup. Confirm your injection pump is set within that range after installation.

Q: Can Stage 4 injectors support 900+ RWHP?

Yes, with a 13mm P-pump and correct supporting modifications. The base ceiling is 850-900 RWHP. The 13mm P-pump configuration is the path to 900+ RWHP.

94-98 Dodge 5.9L 12V Cummins Dynomite Diesel Stage 4 Injector Set

$1,021.25

Part Number: DDP9498-4
Est. Ship Time: Usually Ships from MFG In 1-3 Days

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Not for Sale in California or Colorado
This injector set cannot be sold or shipped to CA or CO addresses. Verify your shipping address is eligible before ordering.

Primarily Intended for Off-Road Use
Stage 4 injectors produce excessive smoke output and are not intended for street use. A heavily modified P-pump and upgraded turbocharger(s) are mandatory. If the truck will see regular street driving, the Stage 3 is the largest street-use set in this lineup.

The DDP9498-4 is a Stage 4 matched injector set for the 1994-1998 Dodge Ram 5.9L 12-valve Cummins. Sold brand new with no core required, these injectors support 850-900 RWHP and are sized to run with a 13mm P-pump for 900+ output with the correct pump. This is a competition and off-road injector - not a street set.

Is This the Right Injector Set?

Buy this if... your 1994-1998 5.9L 12-valve Cummins build has a heavily modified P-pump, upgraded turbocharger(s), and the build is primarily for off-road or competition use targeting 850-900+ RWHP.
Do not choose this if... the truck will see regular street driving - Stage 4 produces excessive smoke output that makes it unsuitable for street use. The Stage 3 is the top of the street-use lineup.
Do not choose this if... the P-pump is not heavily modified or the turbo system is not upgraded to match this fuel level - both are mandatory, not optional.
Verify before ordering... the build is off-road or competition focused, the P-pump and turbo upgrades are confirmed, and your shipping address is outside restricted states.

Stage 4 vs. Stage 3 - This Is a Different Category

Stage 3 is Dynomite Diesel's largest injector set for frequent street use - 700-750 RWHP, modified P-pump required, upgraded turbo required. Stage 4 steps well beyond that into competition and off-road territory. At 63 LPM flow and an 850-900 RWHP ceiling, these injectors are sized for a 13mm P-pump and produce enough fuel that excessive smoke output makes regular street driving impractical.

Stage 4 is also the only set in this lineup that Dynomite explicitly classifies as primarily off-road use. The timing window is wider too - 23-28 degrees versus Stage 3's 20-22 degrees - which reflects the level of pump and engine modification required at this power level. Dynomite highly recommends pairing these with performance delivery valves to take full advantage of the 63 LPM flow rate.

Competition and off-road build with a heavily modified P-pump and upgraded turbo(s)? Stage 4 is correct. Street truck or anything short of that full supporting system? Step back to Stage 3.

Injector Specs

Application	1994-1998 Dodge Ram 5.9L 12-valve Cummins
Stage	Stage 4 - supports 850-900 RWHP (900+ with 13mm P-pump)
Intended Use	Primarily off-road and competition - not for street use
Nozzle Style	SAC nozzle, 5-hole + 2 pilot holes (patented)
Hole Count / Flow	5x14, 63 LPM, 155 degrees
Pop Pressure	270 BAR
Recommended Timing	23-28 degrees
Required Supporting Mods	Heavily modified P-pump, upgraded turbocharger(s)
Copper Washer	0.5mm included
Condition	Brand new matched set
Core Charge	None

Full 94-98 12-Valve Injector Lineup

Stage 4 is the top of the Dynomite Diesel lineup for the 1994-1998 second-gen 12-valve. If the build is not ready for this level, see the other options:

Economy Series - DDP9498-ECO
Stage 1 Injectors - DDP9498-1
Stage 2 Injectors - DDP9498-2
Stage 3 Injectors - DDP9498-3 (largest street-use set)

Avoid These Common Mistakes

Ordering Stage 4 for a street-driven truck. These injectors produce excessive smoke output under normal driving conditions. They are intended for off-road and competition applications. If the truck will be driven on public roads regularly, Stage 3 is the correct top-of-lineup choice for street use.
Running Stage 4 without a heavily modified P-pump and upgraded turbo(s). Both are mandatory - not recommended, mandatory. This fuel level cannot be used correctly without both supporting components in place.
Skipping delivery valves. At 63 LPM, Dynomite highly recommends performance delivery valves to realize the full capability of this injector set.
Ordering for a 1989-1993 or 1999+ 12-valve. These injectors are specific to the 1994-1998 second-gen 12-valve 5.9L Cummins. Verify your exact model year before ordering.

Before You Order

Truck is a 1994-1998 Dodge Ram 5.9L 12-valve Cummins
Build is off-road or competition focused - not primarily street driven
Heavily modified P-pump confirmed in the build plan
Upgraded turbocharger(s) confirmed in the build plan
Shipping address is outside restricted states

All five confirmed? The DDP9498-4 is the correct Stage 4 injector set for your 850-900+ RWHP second-gen 12-valve Cummins build.

Frequently Asked Questions

Click or tap a question below to expand the answer.

Can I run Stage 4 injectors on a street truck?

No. Dynomite Diesel explicitly states that Stage 4 injectors are primarily intended for off-road use due to excessive smoke output. Running them on a street-driven truck will produce heavy smoke under normal driving conditions. If your truck will see regular street use, the Stage 3 is the largest injector set Dynomite recommends for that application.

What supporting modifications are mandatory for Stage 4?

A heavily modified P-pump and upgraded turbocharger(s) are mandatory for Stage 4 injectors. These are not optional recommendations - the source explicitly states both are required. Additionally, Dynomite highly recommends upgrading to performance delivery valves to take full advantage of the 63 LPM flow rate at this stage.

What is the difference between Stage 3 and Stage 4?

Stage 3 supports 700-750 RWHP and is Dynomite's largest street-use injector set. Stage 4 supports 850-900 RWHP (900+ with a 13mm P-pump) and is intended for off-road and competition use only due to excessive smoke output. Stage 4 flows 63 LPM versus Stage 3's 56 LPM, and the timing window is 23-28 degrees versus Stage 3's 20-22 degrees. The required supporting modifications also escalate - Stage 4 requires a heavily modified P-pump where Stage 3 requires a modified P-pump.

What timing do DDP9498-4 Stage 4 injectors require?

Dynomite Diesel recommends 23-28 degrees timing for the Stage 4 set. This is the widest timing window in the lineup and reflects the level of pump and engine modification involved at this power level. Confirm your injection pump is set within that range after installation.

Can Stage 4 injectors support 900+ RWHP?

Yes, with the correct pump. Dynomite states these injectors are sized to run with a 13mm P-pump and can provide 900+ RWHP with that configuration. The base ceiling is 850-900 RWHP with proper supporting modifications. The 13mm P-pump application is the path to the higher end of that range and beyond.

Will these injectors fit a 1994-1998 second-gen 5.9L Cummins?

Yes. These injectors are specific to the 1994-1998 Dodge Ram 5.9L 12-valve Cummins (second-gen platform). They are not compatible with the 1989-1993 first-gen or 1999+ applications. Verify your exact model year before ordering.