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Return Fuel Pump Kit

from $154.95
Hardware Kit Version:

Our Return Fuel Pump Kit is a comprehensive package for a stock fuel pump module build. Intended for those who wish to construct a custom return fuel system, it offers many components out of our own complete return fuel kits. This package provides all the basic components you need to make the original fuel pump assembly compatible with return systems.

The most important component is the CJM regulator delete assembly. This is used to replace the original fuel pressure regulator, seal off its associated passages, and provide a connection for the return-side venturi jets that are necessary for a properly functioning fuel system.

These kits are intended to use the original fuel delivery pipe as the return line. A hose is provided for connecting the original fuel feed bulkhead to the regulator delete assembly. However, we have various QD adapters available to increase your plumbing options (expand the “Tech Info” pane for more details). Fuel pump installation hardware is included: fuel pump strainer, fuel pump support sleeve, fuel pump output hose, and a fuel pump output bulkhead.

Our Return Fuel Pump Kit is a comprehensive package for a stock fuel pump module build. Intended for those who wish to construct a custom return fuel system, it offers many components out of our own complete return fuel kits. This package provides all the basic components you need to make the original fuel pump assembly compatible with return systems.

The most important component is the CJM regulator delete assembly. This is used to replace the original fuel pressure regulator, seal off its associated passages, and provide a connection for the return-side venturi jets that are necessary for a properly functioning fuel system.

These kits are intended to use the original fuel delivery pipe as the return line. A hose is provided for connecting the original fuel feed bulkhead to the regulator delete assembly. However, we have various QD adapters available to increase your plumbing options (expand the “Tech Info” pane for more details). Fuel pump installation hardware is included: fuel pump strainer, fuel pump support sleeve, fuel pump output hose, and a fuel pump output bulkhead.

    • 370Z: All models.

    • G37: Compatible with G37 models equipped with the 370Z-style fuel-pump module. Some early model-year G37s used the 350Z pump module; this kit will not fit those. See our 350Z Return Correction Kit for those applications, or consider our Z34 Retrofit Package to convert your G37 to the newer 370Z-style module. If you’re unsure which module you have, email us your VIN and we’ll confirm.

    • Important: Fits only OEM/Nissan factory fuel pump modules (and genuine-equivalent OEM replacements). Aftermarket assemblies (Amazon/eBay/AliExpress, etc.) are constructed differently and are not compatible.

    • Larger pumps, such as the Walbro 450/525, do not fit into the original fuel-filter housing, so it must be trimmed out and the filter removed. This makes it necessary that you add an inline filter under the car or in the engine bay. This is actually preferred, because the stock fuel filter is not ideal for use with E85 blends.

    • If the pump you install does not require removing the filter from the pump assembly, you can either (A) connect the pump-output hose to the filter input and reuse the filter, or (B) connect the pump-output hose straight to the output bulkhead on the top hat, bypassing the filter. If you reuse the filter, you will need an additional hose. Use our hose (SKU 400.2019) to connect the fuel-pump output to the filter inlet, then use the hose from the return fuel-pump kit to connect the filter outlet to the bulkhead on the top hat.

    • When using the stock plastic hat: The included 6AN bulkhead is intended for the fuel-pump output, and the original plastic SAE bulkhead is repurposed for return fuel. You can use our adapter (SKU 320.0087) to adapt the engine-bay end of the fuel pipe to 6AN. If you would rather connect the original fuel pipe to the provided 6AN bulkhead, use our adapter (SKU 000.4030), and use our adapter (SKU 320.0086) to connect a 6AN return hose to the stock plastic SAE bulkhead.

    • When using the CJM Billet Hat: This kit, combined with the billet hat kit, provides a swivel 6AN bulkhead and a swivel SAE bulkhead (from the billet hat kit) that can be used to connect the stock fuel pipe to either bulkhead. You can use our adapter (SKU 320.0087) to adapt the engine-bay end of the fuel pipe to 6AN when reusing the original pipe for feed or return.