Alliant Power Remanufactured HP4 High Pressure Fuel Injection PumpThe Alliant AP54950 Remanufactured HP4 Injection Pump is a direct replacement for the HPFP in your 17 25 L5P Duramax L5D Duramax. This reman pump is rebuilt to the highest standards and thoroughly tested to ensure years of reliability. Backed by Alliant's 2 Year Unlimited Mileage Warranty.

SPE 2023+ 6

unless otherwise noted

7 liter ISB/QSB engines

CHOOSE YOUR AIRFLOW

Our silicone tube seal creates a tight seal around the air tube allowing for engine movement

we HIGHLY RECOMMEND a Regulated Return kit to protect your investment and maximize your performance

it has a top of the line bearing assembly

9L 64mm drop in turbo as some great increases over the factory turbo

Restores Proper Fuel System Function - Maintains correct fuel return flow

making maintenance a breeze

Never worry about a head gasket issue again

(Patent Pending)