AP Exhaust 48257 Exhaust Pipe - Center

AP Exhaust 48257 Center Exhaust Pipe

AP Exhaust 48257 is an aluminized steel exhaust pipe built as an original equipment replacement for select full-size GM cars. It is made for center exhaust routing and is listed for applications including Buick Roadmaster, Chevrolet Caprice, Oldsmobile Custom Cruiser, Pontiac Parisienne, and Chevrolet Impala.

Key Features

• Aluminized steel construction for corrosion resistance in exhaust service
• Original equipment replacement part for direct-fit service on listed applications
• Center exhaust pipe position
• AP Exhaust part number 48257
• Compatible with select 1985-1993 Buick, Chevrolet, Oldsmobile, and Pontiac applications

Vehicle Fitment

• Fits 1991-1993 Buick Roadmaster, center
• Fits 1991-1993 Chevrolet Caprice, center
• Fits 1985-1986 Chevrolet Caprice, center
• Fits 1993 Chevrolet Caprice, center; except Police Car
• Fits 1991-1992 Chevrolet Caprice, center
• Fits 1991-1992 Oldsmobile Custom Cruiser, center
• Fits 1985-1990 Chevrolet Caprice, center; except California
• Fits 1985-1986 Pontiac Parisienne, center; with Converter
• Fits 1985 Chevrolet Impala, center; except California

Detailed Description

AP Exhaust 48257 is an OE replacement exhaust pipe for center-section exhaust service on select GM B-body vehicles. The aluminized steel construction is suited for exhaust system repair where the original pipe has rusted, cracked, or failed at the welded assembly. This part number 48257 is listed for Buick Roadmaster, Chevrolet Caprice, Oldsmobile Custom Cruiser, Pontiac Parisienne, and Chevrolet Impala applications, with fitment notes that must be matched carefully to the vehicle configuration.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Repair Uses

• Replacing a corroded or perforated center exhaust pipe
• Restoring exhaust flow after a welded OE section fails
• Repairing exhaust leaks at the center section
• Addressing noise from a damaged or separated exhaust pipe
• Returning the exhaust system to OE-style routing on listed vehicles

Installation Notes and Tips

Review the fitment notes before ordering. Several listed applications reference an OE welded assembly and recommend replacing all noted parts [1] together. Confirm whether the vehicle is a California-emissions application, a Police Car, or equipped with a converter where specified. Proper alignment with the existing exhaust system is important for sealing and hanger positioning.

Quality Assurance

AP Exhaust supplies this part as an original equipment replacement exhaust component. The aluminized steel material supports long-term exhaust service in a repair application where OE fit and configuration matter.