DeatschWerks 9-401-607-7041 DW400 Pump Module CPE Return Kit 06-11 Civic Si K20

Vehicle Fitment

• 2006-2011 Honda Civic Si 8th Gen (Si only; K20Z3 2.0L DOHC i-VTEC I4, FWD)

Fitment Notes

• Fits the Honda Civic Si (K20Z3) only - does not fit non-Si 8th Gen Civic trims (DX, LX, EX, HX, GX) which use different fuel systems
• This is the CPE (Convoluted Polyethylene) stainless steel braid return line version - for the PTFE version, see DeatschWerks PN: 9-401-608-7041; for module only (no plumbing kit), see PN: 9-401-7041
• Requires an externally regulated return-style fuel system - not compatible with the factory returnless fuel system without modification
• A 10-gauge hardwire kit is strongly recommended to ensure maximum pump voltage (DeatschWerks PN: FPHWK-10-HD, sold separately)
• Compatible with gasoline, E85, and race fuels

Features

• Complete drop-in module replacement - retains OEM plug-and-play harness connector, fuel level sender, and fuel surge bucket
• Powered by the DW400 415lph pump for significantly higher flow than the factory module
• CPE stainless steel braid feed and return lines with all necessary DW connection fittings included
• Includes DW fuel pressure regulator, DW fuel filter, and DW fuel pressure gauge
• Turbine impeller compatible with pulse width modulated (PWM) pump drivers for quiet operation
• Carbon commutators and fully encapsulated armature for full E85 and ethanol compatibility
• Purpose-built for K20Z3-equipped Civic Si builds running turbo, supercharger, or high-power naturally aspirated setups
• 3-year limited warranty from date of retail purchase

Specifications

• Series: DW400 Pump Modules
• Pump: DW400 415lph
• Fuel Line Type: CPE Stainless Steel Braid
• Flow Rate: 415lph
• Fuel Compatibility: Gasoline, E85, Race Fuels
• Recommended Wiring: 10-gauge hardwire kit (DW PN: FPHWK-10-HD, sold separately)
• Required Fuel System: Regulated return-style (externally regulated)
• Application: Vehicle-Specific (2006-2011 Honda Civic Si K20Z3)

Included Components

• 1x DW400 Fuel Pump Module Assembly (415lph DW400 pump pre-installed)
• 1x CPE Stainless Steel Braid Feed Line with DW Connection Fittings
• 1x CPE Stainless Steel Braid Return Line with DW Connection Fittings
• 1x DW Fuel Pressure Regulator
• 1x DW Fuel Filter
• 1x DW Fuel Pressure Gauge

Product Description

The DeatschWerks 9-401-607-7041 is a complete DW400 fuel pump module with CPE stainless steel braid return plumbing kit, engineered as a direct drop-in replacement for the factory fuel pump module in the 2006-2011 Honda Civic Si (8th Gen, K20Z3). The module retains all OEM functionality including the factory plug-and-play harness connector, fuel level sender, and fuel surge bucket, making installation clean and straightforward. This kit converts the factory returnless fuel system to an externally regulated return-style setup - a return fuel line from the regulator back to the tank must be incorporated as part of the installation.

The included CPE stainless steel braid lines, DW pressure regulator, DW fuel filter, and DW fuel pressure gauge provide everything needed to complete the regulated return fuel system conversion. The DW400's 415lph flow rate and E85-compatible construction make it well suited for K20Z3 Civic Si builds running turbo or supercharger setups that have exceeded stock pump capacity. A 10-gauge hardwire kit (PN: FPHWK-10-HD, sold separately) is strongly recommended to ensure maximum voltage at the pump. For the PTFE stainless steel braid version, see DeatschWerks PN: 9-401-608-7041.