Fel-Pro 61178 Fuel Injection Throttle Body Mounting Gasket

Fel-Pro 61178 Fuel Injection Throttle Body Gasket

Fel-Pro 61178 is a premium composite fuel injection throttle body mounting gasket built for a precise seal between the throttle body and intake surface. It is a direct-fit sealing solution for a wide range of Chevrolet and GMC trucks, vans, and SUVs from 1996-2007.

Key Features

• Composite gasket material for dependable sealing performance
• Premium grade construction for service replacement use
• 3-bolt hole design for the listed throttle body applications
• Inside diameter: 3.031 in. / 76.9 mm
• Outside diameter: 4.818 x 4.806 in.
• Thickness: 0.042 in. / 1.0 mm
• Fits Chevrolet Silverado 2500 HD, Silverado 3500, Suburban 2500, Avalanche 2500, Express 3500, C2500, C3500, K2500, K3500, and related GMC applications

Detailed Description

Fel-Pro 61178 is engineered as a fuel injection throttle body mounting gasket for applications that require a stable seal at the throttle body flange. The composite construction and 1.0 mm thickness help maintain consistent contact across the mounting surface, while the 3-bolt pattern supports the listed GM truck, van, and SUV fitments. This part is a practical choice for service work on Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD models, as well as earlier C/K trucks and full-size vans.

This part cross-references MAHLE G31388 for the same application. Fel-Pro 61178 also cross-references OE-style part numbers 12551240 and 12570168.

What It Helps Address

• Throttle body air leaks at the mounting flange
• Idle instability caused by sealing loss
• Vacuum leaks around the fuel injection throttle body
• Driveability concerns tied to worn or compressed gasket material
• Service replacement needs after throttle body removal

Installation Notes and Tips

• Clean both mating surfaces before installation to remove old gasket material and residue.
• Verify the throttle body flange matches the 3-bolt pattern and listed dimensions.
• Inspect the intake and throttle body surfaces for warpage, corrosion, or damage before assembly.
• Follow the vehicle service procedure and torque sequence specified by the manufacturer.
• Use the fitment list to confirm application by year, make, and model before ordering.

Quality Assurance

Fel-Pro gaskets are built around application-specific materials and sealing designs for vehicle service applications. Fel-Pro 61178 follows that approach with a premium composite construction intended for reliable sealing on the listed Chevrolet and GMC fitments.