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

Keep your EFR bearings lubricated and cool without the guesswork. Upgrading the 2.3L DISI to an EFR turbo is a huge performance leap, but the factory hardlines are a nightmare. They don't fit the EFR threads and they easily crack from engine vibration. This kit replaces those brittle pipes with high-temp PTFE Braided Lines that actually handle the intense heat behind the block. Specifically built for EFR units with internal restrictors, this setup gives you the correct oil flow and cooling needed for high-boost driving.

• No Double-Restriction: Includes a full-flow -4AN inlet fitting. Since EFR turbos have built-in restrictors, our kit ensures you don't starve the bearings of oil.
• Intense Heat Protection: The PTFE lines with stainless steel braiding. They won't get brittle or leak in the cramped "Hot Side" of your engine bay.
• Stop Vibration Cracks: Unlike rigid factory pipes, our flexible hoses absorb engine shakes, protecting your turbo and block from stress-cracking.
• High-Flow Water Loop: Optimized -6AN water lines ensure maximum coolant circulation to prevent your turbo from overheating during hard pulls.

Technical Installation Note

Hardware Compatibility: This kit with thick-profile engine-side drain flange. To ensure a proper installation, an extended engine mount bolts are included to replace the shorter factory hardware.