Norcal Diesel Performance parts and accessories are engineered for diesel owners who demand more than off‑the‑shelf solutions, combining real‑world testing with OE‑plus fitment you can trust. The Norcal Diesel Performance brand stands out because every component is designed, tested, and validated in‑house by technicians who work on Powerstroke, Duramax, and Cummins engines every day. Nothing is sold unless it meets strict standards for performance and long‑term reliability. The product scope covers critical systems such as fuel injection upgrades, engine wiring harnesses, head gaskets, ARP stud kits, sensors and electrical pigtails, valve cover gaskets, exhaust components, battery cable kits, diesel accessories, and ProDuty OEM+ engine and transmission mount kits. Unlike competitors that rely solely on generic sourcing, Norcal Diesel Performance backs its parts with hands‑on experience, vehicle‑specific engineering, and direct expert support, giving customers confidence that each part is built to solve common diesel failure points and perform under real driving and towing conditions.
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Items 1-17 of 17
1994-1996 Ford 7.3L Powerstroke Engine Wiring Harness F6TZ‑9A451‑FNew
Direct‑fit replacement engine wiring harness for 1994–1996 Ford F‑Series 7.3L Powerstroke (OE F6TZ‑9A451‑F). Plug‑and‑play fix for no‑start, stalling, and wiring‑related sensor i...
1996–1997 Ford 7.3L Powerstroke Engine Wiring Harness F7TZ‑9A451‑CANew
Direct‑fit replacement engine wiring harness for 1996–1997 Ford F‑250/F‑350 7.3L Powerstroke (OE F7TZ‑9A451‑CA). Plug‑and‑play solution for no‑start, stalling, and wiring‑relat...
1999.5-2001 Ford 7.3L Powerstroke Engine Harness F81Z‑12B637‑EA (Federal Emissions Only)New
Direct‑fit engine wiring harness F81Z‑12B637‑EA for 1999.5-2001 Ford F‑250/F‑350/F‑450 7.3L Powerstroke with federal emissions and 4R100 Automatic Transmission.
Includes glow plug r...
2000–2001 Ford F-250, F350, F-450, F-550 and Excursion 7.3L Engine Harness YC3Z‑12B637‑BA (CA Emissions)New
Direct‑fit engine wiring harness YC3Z‑12B637‑BA for 2000–2001 Ford Excursion 7.3L Powerstroke with California emissions and automatic transmission. Designed for engines built after 10/25/1...
2002–2003 Ford 7.3L Powerstroke Engine Harness F81Z‑12B637‑FA (Federal Emissions Only)New
Direct‑fit engine wiring harness F81Z‑12B637‑FA for 2002–2003 Ford F‑250/F‑350/F‑450 7.3L Powerstroke with federal emissions and 4R100 Automatic Transmission.
Includes glow plug r...
2003–2004 Ford 6.0L Powerstroke Engine Harness 3C3Z‑12B637‑BANew
Direct‑fit engine wiring harness 3C3Z‑12B637‑BA for 2003–2004 Ford F‑250, F‑350, F‑450, and F‑550 trucks with 6.0L Powerstroke diesel. Designed for trucks built on or after 01/30/2...
2004 Ford 6.0L Powerstroke Engine Harness 4C3Z‑12B637‑AANew
Direct‑fit engine wiring harness 4C3Z‑12B637‑AA for 2004 Ford F‑250, F‑350, F‑450, and F‑550 6.0L Powerstroke trucks. Designed for engines built on or after 09/29/2003 and equipped w...
2004-2005 Ford 6.0L Powerstroke Engine Harness - 4C3Z-12B637-CA - Excursion, No Fuel HeaterNew
OEM‑replacement main engine wiring harness for 2004–2005 6.0L Powerstroke Excursion applications that were built without a fuel heater. Designed from the factory 4C3Z‑12B637‑CA pattern, th...
2005 Ford 6.0L Powerstroke Engine Harness 5C3Z‑12B637‑AANew
OE‑style main engine wiring harness for 2005–2007 6.0L Powerstroke (5C3Z‑12B637‑BA), with an optional matching FICM harness 5C3Z‑9D930‑A to refresh the critical high‑failure circ...
2005–2007 Ford 6.0L Powerstroke Engine Harness 5C3Z‑12B637‑BANew
OE‑style main engine wiring harness for 2005–2007 6.0L Powerstroke (5C3Z‑12B637‑BA), with an optional matching FICM harness 5C3Z‑9D930‑A to refresh the critical high‑failure circ...
Exhaust Backpressure Sensor Tube and Connector Kit for 94-97 Ford 7.3LNew
7.3L Ford Exhaust Backpressure Sensor, Fitting, Tube and Connector Kit
Fits 1994-1997 Ford F-250, F-350, F-450, F-550 with 7.3L Diesel DI Direct Injected
Direct‑fit fuel injector connector repair kit with 16 gauge grey wire pigtails for GM 6.6L LML/L5P and 3.0L LM2/LZ0 Duramax applications.
Set of 8 connectors with approximately 4....