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AP Exhaust 48257 Exhaust Pipe - Center

Brand	AP Exhaust 48257
Position	Center
Material	Aluminized steel
Original Equipment Replacement	Yes
Fits	Buick, Chevrolet, Oldsmobile, and Pontiac · 37 vehicles

OE replacement. Direct-fit exhaust pipe for straightforward installation.

Aluminized steel. Helps resist corrosion for longer service life.

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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.

This part fits 37 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Submodel	Body Type	Liters	Cylinders	Position	Notes
1993	Buick	Roadmaster	Estate Wagon	Wagon	5.7L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1993	Buick	Roadmaster	—	Sedan	5.7L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1993	Chevrolet	Caprice	—	Wagon	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1993	Chevrolet	Caprice	—	Wagon	5.7L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1993	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; except Police Car
1993	Chevrolet	Caprice	—	Sedan	5.7L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; except Police Car
1992	Buick	Roadmaster	Estate Wagon	Wagon	5.7L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1992	Buick	Roadmaster	—	Sedan	5.7L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1992	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	(91-92); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1992	Chevrolet	Caprice	—	Sedan	5.7L	V8	Center	(91-92); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1992	Chevrolet	Caprice	—	Wagon	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1992	Chevrolet	Caprice	—	Wagon	5.7L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1992	Oldsmobile	Custom Cruiser	—	—	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1992	Oldsmobile	Custom Cruiser	—	—	5.7L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1991	Buick	Roadmaster	Estate Wagon	Wagon	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1991	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	(91-92); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1991	Chevrolet	Caprice	—	Sedan	5.7L	V8	Center	(91-92); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1991	Chevrolet	Caprice	—	Wagon	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1991	Oldsmobile	Custom Cruiser	—	—	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1990	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1990	Chevrolet	Caprice	—	Sedan	5.7L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1989	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1989	Chevrolet	Caprice	—	Sedan	5.7L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1988	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1987	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1987	Chevrolet	Caprice	—	Coupe	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1986	Chevrolet	Caprice	—	Wagon	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1986	Chevrolet	Caprice	—	Coupe	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1986	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1986	Pontiac	Parisienne	—	Wagon	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; with Converter
1986	Pontiac	Parisienne	—	Sedan	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; with Converter
1985	Chevrolet	Caprice	—	Wagon	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1985	Chevrolet	Caprice	—	Sedan	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1985	Chevrolet	Caprice	—	Coupe	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1985	Chevrolet	Impala	—	Sedan	5.0L	V8	Center	(exc. California); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
1985	Pontiac	Parisienne	—	Wagon	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; with Converter
1985	Pontiac	Parisienne	—	Sedan	5.0L	V8	Center	OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; with Converter
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