The MagnaFlow BRE Exhaust Kit (BRExhaust direct-fit part 106-0342) is an OE-style replacement system for the 1986–1989 Toyota 4Runner 2.4L four-cylinder, not a performance kit. The manufacturer says its BRExhaust systems are engineered to match original equipment specifications for a specific year, make, model, and engine, and are designed to clear the same axles, crossbars, and brackets the factory system navigates. This suits buyers searching for a direct-fit 86-89 4Runner 2.4L exhaust replacement, a single-box OEM-style muffler and pipe kit, or a 22RE exhaust swap that keeps stock fitment.
Its main advantage over stock or budget replacements is the tubing. The manufacturer states that mandrel-bent pipes hold a consistent interior diameter through each bend, while crush-bent pipes used by many competing replacement systems can collapse at the bends and restrict flow. Everything needed for the swap ships in one box, so you avoid sourcing a muffler, tailpipe, and hangers separately. If you want a louder or more aggressive tone, a performance cat-back is the better choice; this kit is for restoring stock-style fitment and flow on a worn system.
Sub-model and year coverage details vary, so confirm fit with the manufacturer before buying. The manufacturer says its kits are built to original equipment specs for the specific year, make, model, and engine, and recommends checking the vehicle selector first.
The manufacturer states that its direct-fit BRExhaust systems require no cutting, bending, or welding for installation.
Per the manufacturer, mandrel-bent pipes keep a consistent interior diameter through each bend, while crush bending can collapse the pipe wall and restrict exhaust flow.
Per the manufacturer, hardware contents vary by kit. Check the hardware section on the product page for the exact count included with part 106-0342.
This is a bolt-on job rather than a fabrication project, but rust is the main obstacle. Owners on user forums report that the manifold connection is typically the first thing to free up, and loosening the manifold nuts slightly can make the rest of the removal easier. Where old flanges are seized, forum members have cut the rear sections off with a sawzall or torch. Plan on a jack and stands, penetrating oil, a socket set, and a helper, and dry-fit the new system before tightening the clamps. One forum member reported replacing a full system, including the catalytic converter, in under two hours, though results will depend on rust and access.
