Bosal 278-025 Exhaust Muffler Assembly - Rear

Direct-Fit Muffler Assembly for OE-Style Replacement

The Bosal BRExhaust Direct-Fit Exhaust Muffler Assembly is built for a factory-like exhaust note and straightforward replacement on select Nissan and INFINITI rear applications. Part number 278-025 uses a direct-fit layout with a flanged inlet and tip outlet for bolt-on installation without modification.

Built from aluminized steel with 16-gauge steel tubing, this muffler assembly is designed for corrosion protection, low backpressure, and quiet operation. It is a practical choice for drivers looking for a direct replacement muffler for Nissan Maxima, INFINITI I30, or INFINITI I35 rear exhaust service.

Key Features

• Direct-fit exhaust muffler assembly for OE-style replacement
• Aluminized steel construction for added corrosion resistance
• 16-gauge steel tubing for durable exhaust service
• Oval muffler body with factory-like sound control
• Flanged inlet with tip outlet for bolt-on installation
• Designed for low backpressure and quiet exhaust performance
• Part number 278-025 for easy identification

Product Details

The Bosal BRExhaust line focuses on direct-fit exhaust replacement parts that follow original equipment-style dimensions and sound characteristics. This muffler assembly is shaped for rear silencer applications and uses an aluminized steel muffler body and pipe construction to help resist corrosion in everyday driving conditions. The oval body design and internal muffler layout are intended to reduce exhaust noise while maintaining smooth exhaust flow.

Compatible With 2002-2004 INFINITI I35, rear; 2000-2003 Nissan Maxima, rear; 2000-2001 INFINITI I30, rear; and 1999 Nissan Maxima, rear. This part cross-references OE numbers 20100-3Y320 and 20100-3Y370 for the same application. Part number 278-025 is a direct-fit replacement for rear silencer service on these vehicles.

Common Issues This Part Can Address

• Rust or corrosion in the rear muffler assembly
• Excessive exhaust noise from a worn silencer
• Restricted exhaust flow caused by internal deterioration
• Need for a direct replacement after exhaust system damage
• Factory exhaust tone that has become louder or uneven

Installation Notes and Tips

This muffler assembly is designed for bolt-on installation with a flanged inlet and direct-fit configuration. Verify rear position, outlet style, and vehicle application before installation. Because the outlet is a tip style and the inlet uses a two-bolt flange, matching the existing exhaust layout is important for proper alignment on Nissan Maxima and INFINITI rear exhaust service.

Quality Assurance

Bosal BRExhaust parts are sourced through an OE supplier network and built to follow factory-style fit and sound expectations. The aluminized finish and steel construction are selected to support corrosion resistance and consistent exhaust performance in direct-replacement applications.