Lingenfelter NOSTRUM GM LT4 High Pressure Fuel Pump

The Lingenfelter NOSTRUM GM LT4 1150-250 High Pressure Fuel Pump is a universal high-pressure fuel pump (HPFP) core engineered for enhanced performance. With an 11.5mm piston and a maximum operating pressure of 250 bar (3636 PSI), it offers significantly higher rail pressure capabilities compared to the standard GM LT4 pump. This unit is manufactured by Stanadyne. While visually similar to the stock GM LT4 pump (part numbers 12711668 or 12694529), this universal pump features a different low-pressure inlet. It utilizes an AN06 male threaded inlet instead of the LT4's 3/8" SAE quick-connect fitting. This AN fitting allows for easier adaptation to application-specific needs using standard AN hardware. Key specifications include a piston diameter of 11.49 mm, a maximum piston travel of 10 mm, and a displaced flow of 1865.44 mm³ per cam revolution. The high-pressure fitting is M14x1 male thread with an inner female cone, and the low-pressure fitting is AN06 male. It is important to note that this pump is a core component and does not include the accessories and hardware necessary for engine installation. For complete GM LT4 service parts with accessories, customers should consult their local GM parts center.