Firewall Bearing 1-1/8in Assm

The Firewall Bearing 1-1/8in Assm by SWEET is a precision bearing assembly engineered for high-performance automotive applications, particularly in custom engine builds, supercharger installations, and modified driveline systems. This component serves as a critical load-bearing interface between rotating shafts and engine block structure, designed to handle the thermal and mechanical demands of both street and competition environments. Whether you're fabricating a custom serpentine belt system, upgrading a forced induction setup, or restoring a classic vehicle with modern powertrain technology, a firewall bearing assembly maintains alignment and reduces vibration transmission into the cabin.

The 1-1/8 inch bore specification indicates compatibility with standard shaft diameters commonly found in belt-driven accessory systems and specialty drivetrain components. SWEET manufactures this assembly with precision tolerances and quality bearing materials that resist fretting and preload loss under sustained vibration and temperature cycling—hallmarks of long-term reliability in high-revving engines. The compact footprint (3.6 x 1.2 x 4.7 inches) and lightweight construction at just 0.31 lbs make it ideal for space-constrained engine compartments typical of turbocharged retrofits or mid-engine conversions. The assembly design allows for straightforward mounting to engine block or custom fabricated mounts without requiring extensive machine work.

This firewall bearing assembly benefits mechanics and enthusiasts undertaking comprehensive engine modifications, including supercharger installations, belt-drive accessory relocation, and alternative powertrain swaps. It's particularly valuable for builders working on custom serpentine systems where OEM mounting points no longer align with new hardware. Installation requires basic mechanical skill and standard hand tools; proper shaft fit and mounting surface preparation ensure long service life. Verify your specific shaft diameter and mounting orientation before purchase to guarantee correct fitment with your modified engine platform.