Mahle MS12343A Fuel Injection Plenum Gasket Set

Mahle MS12343A Fuel Injection Plenum Gasket Set

Mahle MS12343A is an OEM-standard fuel injection plenum gasket set for service work on select GM applications. Built with paper plenum gasket material, it supports reliable sealing at the intake plenum interface where vacuum integrity and clean fuel delivery matter.

Compatible With 1985-1992 Chevrolet Camaro, 1985-1992 Pontiac Firebird, and other listed V8 applications, this Mahle gasket set is a direct-fit sealing solution for maintenance and repair. It is also a practical choice when replacing a worn plenum gasket on a Chevrolet Corvette, Caprice, or Cadillac Brougham.

• OEM Standard item grade for service replacement use
• Paper plenum gasket material for the lower plenum sealing surface
• Mahle sealing technology trusted by OEMs and technicians
• Fits a range of 1985-1992 GM performance and full-size applications
• Part number MS12343A for accurate ordering and lookup

Application Details

This fuel injection plenum gasket set is used on select Cadillac, Chevrolet, Buick, Oldsmobile, and Pontiac vehicles. Fits 1991-1992 Cadillac Brougham, N/A; Fits 1985-1992 Chevrolet Camaro, N/A; Fits 1990-1992 Chevrolet Caprice, N/A; Fits 1991-1992 Chevrolet Commercial Chassis, N/A; Fits 1991-1992 Oldsmobile Custom Cruiser, N/A; Fits 1985-1992 Pontiac Firebird, N/A; Fits 1991 Buick Roadmaster, N/A; Fits 1985-1991 Chevrolet Corvette, N/A. This part cross-references FEL-PRO (e.g., MS 93160) for the same application.

What It Is Used For

• Replacing a leaking lower plenum gasket
• Restoring intake sealing on GM fuel-injected engines
• Addressing vacuum leaks that affect idle quality
• Correcting unmetered air entry at the plenum interface
• Supporting service repairs on Camaro, Firebird, and Corvette applications

Installation Notes and Tips

Confirm engine configuration and lower plenum application before installation. Clean both sealing surfaces thoroughly and inspect the intake components for warpage, carbon buildup, or damage before reassembly. Follow the vehicle service manual for torque sequence and tightening specifications. MS12343A is listed for lower plenum use, and one fitment note states it is not compatible with a paper engine oil pan gasket on 1991-1992 Chevrolet Commercial Chassis applications.

Quality Assurance

Mahle gaskets are engineered to meet OEM-standard service expectations and are used by OEMs and technicians worldwide for sealing applications.