Standard Ignition PG91 Fuel Injection Plenum Gasket

Fuel Injection Plenum Gasket for Mazda B4000

Standard Ignition PG91 is a fuel injection plenum gasket built for sealing the intake manifold interface on select Mazda B4000 applications. It uses rubber construction with an MFI seal type and includes the intake manifold gasket specified for this application.

• Fuel injection plenum gasket for intake sealing service
• Rubber material for a formed sealing surface
• MFI seal type for the intake manifold connection
• Intake manifold gasket included
• Direct fitment for 2001-2004 Mazda B4000

Application Details

Compatible with 2001-2004 Mazda B4000 models, Standard Ignition PG91 is used at the plenum-to-intake sealing point to help maintain a proper seal in the air and fuel delivery system. This part cross-references Walker Exhaust 50095 for the same application. The PG91 part number is also referenced in interchange listings for related service use.

What It Helps Address

• Intake manifold vacuum leaks at the plenum sealing surface
• Unstable idle caused by air entering past a worn gasket
• Fuel trim issues related to intake sealing loss
• Rough running after intake manifold service
• Sealing deterioration from age, heat, and engine exposure

Installation Notes

Clean the mating surfaces thoroughly before installation and inspect the intake manifold and plenum for warpage or damage. Verify the gasket orientation against the intake layout on the Mazda B4000, and follow the vehicle service procedure for torque sequence and recheck steps. Standard Ignition PG91 is listed for 2001, 2002, 2003, and 2004 Mazda B4000 applications.

Quality Assurance

Standard Ignition supplies replacement engine sealing components for service work where accurate fit and material selection matter. PG91 is cataloged as a fuel injection plenum gasket with the specified rubber construction and included intake manifold gasket for the listed Mazda B4000 fitment.