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If you're looking for better diesel fuel economy, more horsepower, and a diesel torque boost, an Adrenaline HPOP 7.3 upgrade might be the "unicorn" you're after. DHD has written extensively about 7.3 HPOP Upgrades, HPOP leaks, and HPOP R&R procedures. Now let's go deeper with a down and dirty 7.3 HPOP solution that's one of the best upgrades you can give your 7.3 Powerstroke. What's Included With a 7.3 Adrenaline HPOP Dieselsite describes it as a "Higher-Volume High Pressure Oil Pump with mounting gasket and o-rings" Wanna know where those gaskets and o-rings go? Get the full details on how to remove and replace the 7.3 Powerstroke HPOP. Adrenaline HPOP 2 Year Warranty Dieselsite says the warranty "...covers anything short of abuse, tampering and obvious physical damage caused by you. Warranties are VOID on any pump that has been tampered with." Bottom line — don't mess with it, just install it. 2 Ways to get a 7.3 Adrenaline HPOP Pay a core fee that's refundable once you send them your stock 7.3 HPOPShip your used 7.3 HPOP core before you get your HPOP to avoid a core charge. And, "YOU CAN SEND ANY YEAR 7.3L 1994-2003 FOR A CORE." Fair enough... 7.3 Adrenaline HPOP Fitment 7.3 Adrenaline Compatibility The Adrenaline HPOP 7.3 works with the following 7.3 injectors: AA Code Single Shot -1994-1997 7.3 - stock injectors to 200ccAB Code Split Shot - Early 1999 and California 1997 7.3 - stock injectors to 175ccAD Code Split Shot - 1999.5-2003 7.3 - stock injectors to 175ccAC Code Single Shot - T444E and 7.3 aftermarket - stock injectors to 200ccAD Hybrids - 7.3 aftermarket injectors - up to 285cc 7.3 Adrenaline Fitment The 7.3 Adrenaline will fit 1994-2003 7.3 diesel Powerstrokes. However, there are two flavors/options to choose from and you have to specify which one fits your truck. Adrenaline anti-drainback feature Option - 1994-1995 - with an anti-drainback featureOption - 1996-2003.5 - without the anti-drainback feature. Adrenaline HPOP Fitting Thread Options You've got a couple of fitting thread options that effect the price of the Adrenaline. Given that over-torquing 7.3 HPOP fittings can ruin the entire high pressure oil pump and cause it to have to be refurbished again, you should at least be aware that the threads are ... "sensitive." (i.e. the o-rings on the fittings are what make the seal to the HPOP and NOT cranking down on the fittings with a crowbar!) Option - Standard OEM ThreadsReinforced Stainless Steel Threads 7.3 Adrenaline HPOP Benefits Dieselsite's Adrenaline HPOP upgrade is a "bolt-on heavy-duty refurbished 7.3 HPOP replacement." As such, the many reviews and reports I researched suggest you may get the following benefits: Even your stock 7.3 Powerstroke with no other mods may see a performance increaseBetter fuel economy in every model year 7.37.3 horsepower increases are heavily dependent on the size of injector upgrade that you combine with an Adrenaline upgrade.7.3 torque, pulling power, increases in all model years Bear in mind, it's tough to get performance boosts out of upgraded, higher flow, injectors if you don't upgrade your 7.3 HPOP. In Dieselsite's own words "The bigger the injector - the more power gains." How much horsepower and torque improvements will a 7.3 Adrenaline get you? Though the Adrenaline 7.3 HPOP upgrades are rebuilt and tested to exacting specs, every installation—every truck—is different. The reports and reviews I researched reported the following: A slight 1-3 MPG increase in 7.3 fuel economy.Driver noticeable increases in both 7.3 horsepowerAnd towing torque perceptions that are consistent with the Dieselsite claims. And though these are by no means scientifically, lab-tested results, every review points to happy 7.3 Powerstroke owners, reviving their tired and multi-hundred-thousand-mile diesels with a new Adrenaline HPOP at the core of their fuel delivery system. And that ain't bad. Who should buy a 7.3 Adrenaline HPOP? If you're: Reviving a high mileage 7.3 PowerstrokeUpgrading your injectors to higher flow performance injectorsTrying to increase the torque, horsepower, and/or fuel economy of your 7.3 Powerstroke ... even a littleGetting ready to create your dream towing machine A new Adrenaline HPOP for your 7.3 is a great place to start! Get the 7.3 Adrenaline HPOP on Amazon Get the 7.3 Adrenaline HPOP on eBay Adrenaline HPOP 1/4 Mile Speed Test Here's a fun video, testing a 7.3 with an Adrenaline HPOP on a 1/4 mile drag strip. The guy spitting as the truck passes by seals it. "That dog will hunt, right there!" https://youtu.be/K4a6F4h8dsE Further Reading on the 7.3 HPOP If you want to get down into the details of the 7.3 Powertroke HPOP as well as the HEUI fuel delivery system, here are our top articles on the 7.3 HPOP.

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