Product Description
BorgWarner 179423 EFR Hardware Installation Kit
BORGWARNER 179423 EFR Hardware Installation Kit gives you all of the essential hardware needed to correctly install your EFR turbo. From V-band clamps to gaskets, it’s a complete set built for quality and fitment.
Kit Contents & Spec
- (1) Turbine housing outlet V-band clamp
- (2) V-band clamp nuts
- (2) Water port plugs with (6) water port plug sealing washers
- (2) Oil drain flange gaskets
- (1) Oil inlet fitting (-04AN) with seal and washer
- (1) Compressor cover outlet V-band clamp (for 83 & 91 mm covers)
- (5) Turbine housing-to-bearing housing clamp plates & (5) clamp plate bolts
- (1) Turbine inlet gasket for T25 flange
- (1) Turbine inlet gasket for T3 flange
- (1) Turbine inlet gasket for T4 divided flange
Universal hardware kit for all BorgWarner EFR turbo models. Ensure your flange-type and clamp style match before install.
What’s Included
- BorgWarner 179423 EFR Hardware Installation Kit (all pieces listed above)
Recommended Add-Ons
- CPP -12AN Oil Drain Kit for S300/S400 (also works with EFRs with-04AN oil inlet)
- Fleece FPE-34856 Turbo Stud Kit (good upgrade for bolt/clamp hardware in high temps)
- CPP Compressor Discharge / Outlet Elbow (if matching outlet geometry)
Fitment & Usage Tips
This hardware kit works universally with all BorgWarner EFR turbos. Be sure to verify which turbine inlet flange style you have (T25, T3, or T4 divided), and that the compressor cover outlet and turbine housing outlet bolts/v-bands match your turbo housing. Use clean hardware surfaces; check torques to OEM spec.
Shop Turbo Sections by Vehicle
Dodge/Ram Cummins
- CUMMINS MAIN HUB (Home tab)
- 1998.5–2002 5.9L (VP44) — Turbocharger
- 2003–2007 5.9L CR — Turbo/Supercharger
- 2007.5–2012 6.7L — Turbocharger
- 2013–2018 6.7L — Turbocharger
- 2019–2024 6.7L — Turbos & Accessories
Ford Powerstroke
GM Duramax
FAQ
Which flange gasket do I need for my EFR turbo?
This kit includes gaskets for T25, T3, and T4 divided flanges. Match the flange on your EFR model (check part number or BorgWarner specs) before installing.
Does it include all needed oil/water plugs?
Yes — includes water port plugs with sealing washers, oil drain flange gaskets, and oil inlet fitting with seal.
Will this work with both 83mm & 91mm compressor covers?
The compressor cover outlet V-band clamp included is sized to work with 83 & 91 mm compressor cover outlet ports.
Can I reuse my old hardware?
Where possible, yes — but reusing worn or deformed clamps, bolts, or gaskets can lead to leaks or failure. This kit gives fresh correct spec parts, which is especially important in high heat or boost applications.
Does CPP have matching accessories or help with fitment?
Yes — we carry full turbo hardware & accessory lines, and our support staff can assist specifying flanges, clamps, etc., for Cummins, Powerstroke & Duramax applications.
Why Buy BorgWarner Turbos & Hardware from CPP Diesel
- Genuine OEM hardware, not aftermarket knock-offs
- Full kits to simplify install & eliminate “missing parts” delays
- Fast shipping with quality packaging
- Expert support focused on Cummins, Powerstroke & Duramax platforms
