ECS Heavy Duty 14mm Differential Bushing Upgrade - E36
When high torque loads and aggressive corner exits push your chassis to the limit, stock differential mounts quickly become the weak link. The ECS Tuning Rear Differential Front Mount Upgrade Kit is track-engineered to lock down your rear diff, control axle wrap, and ensure immediate power delivery to the pavement.
Built to withstand severe track abuse, this kit eliminates hardware failure by replacing the undersized factory M12 bolt with an ultra-high-tensile Grade 12.9 M14x1.5 bolt. Surrounding the upgraded hardware is a track-spec 95A durometer red polyurethane bushing and a rugged 6061-T6 aluminum sleeve finished in Type II black anodizing. Engineered for maximum drivetrain stiffness, this upgrade ensures your differential stays precisely aligned under the harshest motorsport conditions.
Note: Upgrading to M14x1.5 hardware requires drilling and tapping the original M12x1.5 differential mounting hole. See T#58563042 for a complete kit that includes the proper-sized drill and tap.
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Product Details
When high torque loads and aggressive corner exits push your chassis to the limit, stock differential mounts quickly become the weak link. The ECS Tuning Rear Differential Front Mount Upgrade Kit is track-engineered to lock down your rear diff, control axle wrap, and ensure immediate power delivery to the pavement.
Built to withstand severe track abuse, this kit eliminates hardware failure by replacing the undersized factory M12 bolt with an ultra-high-tensile Grade 12.9 M14x1.5 bolt. Surrounding the upgraded hardware is a track-spec 95A durometer red polyurethane bushing and a rugged 6061-T6 aluminum sleeve finished in Type II black anodizing. Engineered for maximum drivetrain stiffness, this upgrade ensures your differential stays precisely aligned under the harshest motorsport conditions.
Note: Upgrading to M14x1.5 hardware requires drilling and tapping the original M12x1.5 differential mounting hole. See T#58563042 for a complete kit that includes the proper-sized drill and tap.
Product Highlights:
- Race-Grade M14 Upgrade: Replaces factory M12 hardware with a Grade 12.9 M14x1.5 bolt to eliminate bolt shear and deflection under high load.
- Track-Spec Polyurethane: Stiff 95A durometer red poly minimizes power-train flex for instantaneous power transfer.
- Anodized Billet Sleeve: CNC-machined 6061-T6 aluminum sleeve with Type II black anodizing offers superior strength and wear resistance.
- Supplied Grease: Includes 5mL of high-tack polyurethane grease for smooth operation.
- Tech Note: Differential housing must be drilled and tapped to M14x1.5 to accommodate the oversized Grade 12.9 hardware. The required drill bit and tap are available separately to ensure precise, race-prep machining.
Installation & Support:
- Click HERE for Installation Instructions -
Prop 65 Warning
- 33176760337
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