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Thumbnail Filmstrip of 7.3 OBS Powerstroke Adrenaline HPOP Stainless Steel Threads DieselSite ADR95SI Images
The DieselSite Adrenaline HPOP (High Pressure Oil Pump) with stainless steel threads is the best direct-fit performance upgrade available for 1994–1995 7.3L Power Stroke engines. This high-volume pump is a true bolt-on replacement that delivers significantly more oil flow and maintains stable high-pressure oil delivery far longer than the factory OE pump.
Why the Adrenaline HPOP Stands Out
The High Pressure Oil Pump is the heart of the 7.3L Power Stroke’s HEUI injection system. When it weakens with age or mileage, you lose ICP pressure, which leads to hard starts, loss of power, poor fuel economy, and the dreaded P1211 code. The Adrenaline solves these issues while giving your truck more pulling power, quicker startups, and better overall drivability — even on completely stock trucks.
Key advantages include:
- Stainless steel reinforced threads on the outlet ports — eliminates the common problem of stripped threads when installing or tightening HPOP lines (a major failure point on original pumps).
- Higher volume output that supports larger injectors (up to 275cc hybrids / ~550 hp) while still performing excellently with stock or mildly modified injectors.
- Maintains optimal injection control pressure (ICP) under load far better than stock, improving fuel atomization and efficiency.
- Proven reliability as both a performance upgrade and a long-term OEM-style replacement.
Real-World Benefits
- More consistent power and throttle response
- Improved fuel economy (many owners report 1–2+ MPG gains)
- Stronger towing performance
- Faster, more reliable cold and hot starts
- Future-proofs your truck for larger injectors or high-mileage reliability
Stock trucks notice a difference. Modified trucks with bigger injectors see even bigger gains because the Adrenaline can keep up with the increased oil demand that quickly starves a factory pump.
Fitment & Important Notes
Fits: 1994–1995 7.3L Power Stroke (OBS) with the Anti-Drainback feature.
Critical Serial Number Check:
- Engine serial number 201680 and before → Requires the Anti-Drainback version (this pump).
- Engine serial number 201681 and after → Use the non-Anti-Drainback version (DieselSite ADRSI).
This pump is a direct bolt-in replacement and requires no additional modifications for installation.
Note: The replacement pump does not include the IPR valve or HPOP hose fittings. When returning your core, you must remove the IPR valve and hose fittings from your old pump.
What's Included
- DieselSite Adrenaline HPOP with stainless steel threads
- New mounting gasket
- Required O-rings
Warranty
3 Year / Unlimited Mileage warranty backed by DieselSite
The DieselSite Adrenaline HPOP (High Pressure Oil Pump) with stainless steel threads is the best direct-fit performance upgrade available for 1994–1995 7.3L Power Stroke engines. This high-volume pump is a true bolt-on replacement that delivers significantly more oil flow and maintains stable high-pressure oil delivery far longer than the factory OE pump.
Why the Adrenaline HPOP Stands Out
The High Pressure Oil Pump is the heart of the 7.3L Power Stroke’s HEUI injection system. When it weakens with age or mileage, you lose ICP pressure, which leads to hard starts, loss of power, poor fuel economy, and the dreaded P1211 code. The Adrenaline solves these issues while giving your truck more pulling power, quicker startups, and better overall drivability — even on completely stock trucks.
Key advantages include:
Stainless steel reinforced threads on the outlet ports — eliminates the common problem of stripped threads when installing or tightening HPOP lines (a major failure point on original pumps).
Higher volume output that supports larger injectors (up to 275cc hybrids / ~550 hp) while still performing excellently with stock or mil[...]
The DieselSite Adrenaline HPOP (High Pressure Oil Pump) with stainless steel threads is the best direct-fit performance upgrade available for 1994–1995 7.3L Power Stroke engines. This high-volume pump is a true bolt-on replacement that delivers significantly more oil flow and maintains stable high-pressure oil delivery far longer than the factory OE pump.
Why the Adrenaline HPOP Stands Out
The High Pressure Oil Pump is the heart of the 7.3L Power Stroke’s HEUI injection system. When it weakens with age or mileage, you lose ICP pressure, which leads to hard starts, loss of power, poor fuel economy, and the dreaded P1211 code. The Adrenaline solves these issues while giving your truck more pulling power, quicker startups, and better overall drivability — even on completely stock trucks.
Key advantages include:
- Stainless steel reinforced threads on the outlet ports — eliminates the common problem of stripped threads when installing or tightening HPOP lines (a major failure point on original pumps).
- Higher volume output that supports larger injectors (up to 275cc hybrids / ~550 hp) while still performing excellently with stock or mildly modified injectors.
- Maintains optimal injection control pressure (ICP) under load far better than stock, improving fuel atomization and efficiency.
- Proven reliability as both a performance upgrade and a long-term OEM-style replacement.
Real-World Benefits
- More consistent power and throttle response
- Improved fuel economy (many owners report 1–2+ MPG gains)
- Stronger towing performance
- Faster, more reliable cold and hot starts
- Future-proofs your truck for larger injectors or high-mileage reliability
Stock trucks notice a difference. Modified trucks with bigger injectors see even bigger gains because the Adrenaline can keep up with the increased oil demand that quickly starves a factory pump.
Fitment & Important Notes
Fits: 1994–1995 7.3L Power Stroke (OBS) with the Anti-Drainback feature.
Critical Serial Number Check:
- Engine serial number 201680 and before → Requires the Anti-Drainback version (this pump).
- Engine serial number 201681 and after → Use the non-Anti-Drainback version (DieselSite ADRSI).
This pump is a direct bolt-in replacement and requires no additional modifications for installation.
Note: The replacement pump does not include the IPR valve or HPOP hose fittings. When returning your core, you must remove the IPR valve and hose fittings from your old pump.
What's Included
- DieselSite Adrenaline HPOP with stainless steel threads
- New mounting gasket
- Required O-rings
Warranty
3 Year / Unlimited Mileage warranty backed by DieselSite
Q
Jack • 01/28/2026, 1:50:11 PM
So my truck is a 95. However at 180k someone put a reman block in it with a reman HPOP. My serial number is stamped 286986 I believe. That means I dont NEED antidrainback? Will it hurt to have it?
A
01/28/2026, 2:42:13 PM
By the serial provided, this would need a 1996-2003 model HPOP. If you install a 94-95 hpop on a 96-03 engine, it will not hurt, no affect on performance.
Q
Jack • 02/08/2026, 7:19:14 PM
Couple weeks ago I asked “ So my truck is a 95. However at 180k someone put a reman block in it with a reman HPOP. My serial number is stamped 286986 I believe. That means I dont NEED antidrainback? Will it hurt to have it?”. Someone responded with “By the serial provided, this would need a 1996-2003 model HPOP. If you install a 94-95 hpop on a 96-03 engine, it will not hurt, no affect on performance“
So I ordered newer one. Turns out they installed older hpop on newer block. Yes, both the block and the HPOP have anti drain back valves. So if I service the block valve, I should be fine installing the newer style HPOP only have antidrain valve in the reman block? I know common sense agrees with what I am asking, but I am nervous to make assumptions with this kind of money involved.
A
02/09/2026, 1:52:41 PM
Please call our sales/tech line in the contact us page.
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4.64/5 Stars out of 11 Reviews
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Lil chris (New mexico) | February 8th, 2023
Part works beautifully I�m happy I spent the money
Ken Anderson (Michigan) | September 12th, 2022
Replaced the original HPOP in my 01 with the adrenaline pump from Full Force Diesel . The original one only lasted 470,000 miles. Never realized the truck was suffering from old age. Upon installing the Adrenaline pump, I have much more power and instantly got a 2 mile per gallon bonus. By my uneducated calculations that�s a gallon every 170 miles which means this pump will completely pay for itself in a couple hundred thousand miles. Loving the power??
Trent (Utah) | July 12th, 2022
My truck was down for 2 months waiting on an hpop, I wish I knew about full force sooner, thoroughbred dropped the ball big time in this
Norman McGrath (Conneautville) | December 30th, 2021
Good quality item would highly recommend
Ken (Reno) | October 24th, 2021
Works fine so far. Good shipping response
Proposition 65 Warning Information -
P65Warnings.ca.gov
Fits: 7.3 Powerstroke 1994-2003
Fits: Powerstroke 1994-2010
Fits: 7.3 Powerstroke 1994-2003
Fits: 7.3 Powerstroke 1996-2003
Fits: 7.3 Powerstroke 1994-1997