Mazdaspeed 3 / 6 & CX-7 Turbo Oil Drain Hose Kit | BorgWarner EFR 6258 6758 7163

This turbo oil drain hose kit is designed for Mazdaspeed 3, Mazdaspeed 6 and Mazda CX-7 models equipped with the 2.3L MZR DISI Turbo engine and converted to a compatible BorgWarner EFR 6258, 6758 or 7163 turbocharger. It provides the external gravity-return connection between the upgraded turbocharger and the engine oil-return location.

Converting from the factory K0422 turbocharger to a BorgWarner EFR unit changes the turbo oil drain flange pattern and return-line routing. The original K0422 drain pipe is not designed to connect directly to the EFR center housing, requiring compatible drain flanges and a flexible hose assembly for the conversion.

This GryphonTek kit uses a flexible 3/4-inch reinforced NBR oil hose with CNC-machined 6061-T6 aluminum drain flange assemblies at both ends. The EFR-specific turbo-side flange connects to the upgraded turbocharger, while the thick-profile engine-side flange connects the gravity-return hose to the factory engine oil-return location.

Key Features

• Application-specific turbo oil drain conversion for listed BorgWarner EFR turbochargers
• Flexible 3/4-inch reinforced NBR hose for the gravity-return system
• CNC-machined 6061-T6 EFR turbo-side and thick-profile engine-side drain flanges
• Includes matched Interface N-8092 drain gaskets, stainless steel hose clamps and mounting hardware

Installation Note

This kit uses a thick-profile engine-side oil drain flange. The included extended engine-mount bolts must be installed in place of the shorter factory bolts to provide the required clearance and thread engagement. Do not reuse the shorter factory bolts with the thick-profile flange.

Need help confirming your setup? View the Mazdaspeed 2.3L DISI Turbo Oil & Water Line Guide.