Straub 346-9250 LS Rear Main Seal Housing with Seal Aluminum

The Straub 346-9250 is a precision-engineered rear main seal housing designed for GM LS-series engines. This complete assembly includes both the aluminum housing and a pre-installed rear main seal, providing a reliable solution for preventing oil leaks at the crankshaft interface.

Key Features:

• Machined aluminum construction for superior durability and heat dissipation
• Natural finish for easy visual inspection and professional appearance
• Includes high-quality rear main seal pre-installed for convenience
• Precision-engineered fitment for GM LS-series engines
• Compatible with LS1, LS2, LS3, LS6, and most LS engine variants (excludes LSX)
• OEM-quality replacement for GM part numbers 12633579 and 12639250

The rear main seal housing is a critical component that mounts to the back of the engine block and retains the crankshaft seal. Straub Technologies' aluminum design offers improved strength over stock housings while maintaining proper sealing to prevent costly oil leaks. This kit provides everything needed for a complete rear main seal housing replacement during engine rebuilds or seal replacement procedures.