Engine Components

Hard to find replacement connector with 6" pigtail for use on the 2020+ Ford Powerstroke cooling fan clutch. Produced in-house, our manufacturing p...

Our replacement fan extension harness for the 2011-2018 Ford with 6.7L Power Stroke allows you to repair a broken or damaged harness without needin...

The Fleece Performance Charging Circuit Harness for the 2019 Ford 6.7L Power Stroke is a drop-in replacement with no cutting or splicing to fix the...

The Fleece Performance Charging Circuit Harness for the 2017-2018 Ford 6.7L Power Stroke is a drop-in replacement with no cutting or splicing to fi...

The Fleece Performance Charging Circuit Harness for 2011-2016 Ford 6.7L Power Stroke is a drop-in replacement with no cutting or splicing to fix th...

Replacement connector with 48" pigtail for use on the 6.0 and 6.4 Powerstroke engines. The additional length pigtail allows for routing of the harn...

Replacement connector with 6" pigtail for use on the 2011-2016 6.6L Duramax MAF sensor. Produced in-house, our manufacturing process includes fully...

Our Fuel Rail Pressure harness for the 2011-2016 6.6L Duramax is a direct replacement for GM Part Numbers 12647115 and 12638158. Produced in-house,...

Our Fuel Pressure Regulator (FPR) harness for the 2001-2010 6.6L Duramax is a direct replacement for GM Part Number: 97378671 (MY 2006-2010) and 97...

Replacement engine starter connector with 6" pigtail for use on the 2003-2018 Cummins. Produced in-house, our manufacturing process includes fully ...

Replacement connector with 6" pigtail. Includes heat-sealable butt-style connectors. Produced in-house, our manufacturing process includes fully au...

Cummins injector harness connector with 6" pigtail for 2006 - 2022 5.9L and 6.7L Cummins engines. Two of these connectors are utilized on the engin...

Our replacement fan extension harness for the 2019-2024 Ram with 6.7L Cummins allows you to repair a broken or damaged harness without needing to r...

Our replacement fan extension harness for the 2013-2018 Ram with 6.7L Cummins allows you to repair a broken or damaged harness without needing to r...

Replacement connectors with 6" pigtail for use on the Cummins engine, this kit includes BOTH sides of the connector with flying leads to allow you ...

Replacement connector with 6" pigtail for use on the 2007-2022 Ram with 6.7L Cummins along with many other applications. Produced in-house, our man...

Regulator extension harness for use with Bosch CP3's used in 6.6L Duramax applications.Warranty

Extension harness for use with air intake sensors on 2013-2018 Dodge Ram with 6.7L Cummins.Warranty

dress up your engine bay with our billet aluminum oil cap for the Chevy Duramax! Includes O-ring and cam-lock and is a direct replacement for your ...

2001-2023 Duramax Billet Coolant Block Off Plate (Replaces GM P/N: 97941204) OE covers are prone to leakage as the gaskets dry out and factory cast...

Trust Fleece Performance to bring you the best OE alternative parts you need! Our replacement rocker arm assembly fits 1998.5-2018 Dodge 5.9L and 6...

Trust Fleece Performance to bring you the best OE alternative parts you need! Our replacement head gasket for the 6.7L Cummins will ensure your eng...

Cummins Mechanical Fuel Pump Block Off Plate Have you upgraded from your factory mechanical lift pump to an electric pump? This block off will elim...

Replacement cylinder head dowels for use between the engine block and cylinder head. Replaces Cummins part number 3902343. Kit includes 2 dowels. F...

Introducing our Freedom Series cylinder heads for the 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engin...

Introducing our Freedom Series cylinder heads for the 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engin...

Introducing our Freedom Series cylinder heads for the 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engin...

Introducing our Freedom Series cylinder heads for the 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engin...

Introducing our Freedom Series cylinder heads for the 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engin...

Introducing our Freedom Series cylinder heads for the 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engin...

ALL NEW! Freedom Series cylinder heads for the LB7 6.6L Duramax now with a cupless injector bore - save time and money with no more injector cups t...

ALL NEW! Freedom Series cylinder heads for the LB7 6.6L Duramax now with a cupless injector bore - save time and money with no more injector cups t...

When replacing the stock VGT turbo on your 6.7L Cummins with a non-water cooled turbo, these delete plugs are a must. They conveniently fit the sto...

Our replacement turbine shaft speed sensor works on all Cummins Holset HE351VE and HE300VE/VG turbos on the 6.7L Dodge, MY 2007.5-2024. Replaces Cu...

The billet aluminum HE351CW Actuator Solenoid Plug w/ Boost Reference allows you to block the boost reference port but still provide the wastegate ...

Fleece Performance stainless steel exhaust manifold stud kit for Cummins. Our exhaust manifold studs are produced from aged 603 stainless steel and...

Fleece Performance stainless steel exhaust manifold stud kit for Cummins. Our exhaust manifold studs are produced from aged 603 stainless steel and...

Fleece Performance billet aluminum fan drive pulley in black anodized finish for the 2003-2012 Cummins equipped RAM. Our pulley is a direct replac...

Fleece Performance billet aluminum fan drive pulley in black anodized finish for the 2013-2018 Cummins equipped RAM. Our pulley is a direct replace...

Fleece Performance 03-18 Dodge 2500/3500 Cummins Upper Fan Pulley Idler (Black Contrast)