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Restore Your 4Runner's Exhaust with a Precision Bolt-On Fit: No Cutting, No Welding, All Hardware Included
The MagnaFlow BRE Direct-Fit Replacement Exhaust Kit 106-0397 is engineered specifically to replace the factory exhaust system on 1989, 1990, and 1991 Toyota 4Runner models equipped with the 3.0L V6 engine. Part number 106-0397 eliminates the guesswork from exhaust replacement by delivering a complete, ready-to-install system with all required hardware, gaskets, and clamps included in the box.
Unlike generic aftermarket systems that require cutting or bending at installation, the 106-0397 uses precision mandrel-bent pipe sections that follow the exact routing geometry of the factory Toyota exhaust. Mandrel bending preserves the internal pipe diameter throughout every bend, maximizing exhaust flow velocity where crush-bending would create a restriction. The result is a direct-fit replacement that performs at or above OEM flow specifications.
MagnaFlow 106-0397 is built with aluminized steel construction that provides reliable corrosion resistance for daily-driven applications, and the complete system is covered by MagnaFlow's two-year, unlimited-mileage warranty. The OEM cross-reference for 106-0397 covers factory parts 17430-YZZG2 and 17430-YZZP6.
Direct-Fit Engineering
The 106-0397 system uses a bolt-on inlet design that connects directly to the existing Toyota 4Runner catalytic converter outlet flange using the included ring gasket and hardware. The multi-piece system design allows a single installer to manage each section without specialized lifting equipment. Mounting brackets are included to ensure proper hanger routing and eliminate contact with surrounding components.
What's Included
- 1 mandrel-bent aluminized steel pipe section with muffler
- 1 exhaust tip (natural finish)
- 1 ring gasket
- 1 U-bolt clamp (1.75 in)
- 2 bolts and 2 nuts
- Mounting brackets
Specifications
| Attribute | Detail |
|---|---|
| MPN | 106-0397 |
| UPC | 888563163222 |
| Brand | MagnaFlow (BRExhaust) |
| Series | BRExhaust Direct-Fit Replacement |
| Pipe Material | Aluminized Steel |
| Inlet Type | Bolt-On (cone seat flange) |
| Main Pipe Diameter | 1.75 in |
| Muffler Length | 15.5 in |
| Muffler Height | 6.0 in |
| Muffler Width | 6.0 in |
| Exhaust Tips Included | 1 |
| Muffler Quantity | 1 |
| Hangers Included | No (uses factory hanger mounts) |
| Mounting Bracket Included | Yes |
| Clamps Included | Yes (1.75 in U-bolt clamp) |
| Gasket Included | Yes (ring gasket) |
| Catalytic Converter Included | No |
| OEM Interchange | 17430-YZZG2, 17430-YZZP6 |
| Warranty | 2 years, unlimited mileage |
Vehicle Fitment
| Year | Make | Model | Submodel | Engine |
|---|---|---|---|---|
| 1989 | Toyota | 4Runner | SR5 | 3.0L V6 |
| 1990 | Toyota | 4Runner | SR5 | 3.0L V6 |
| 1991 | Toyota | 4Runner | SR5 | 3.0L V6 |
Frequently Asked Questions
Does MagnaFlow 106-0397 require cutting or welding?
No. The 106-0397 is a bolt-on, direct-fit replacement system. No cutting, bending, or welding is required. Basic mechanical skills and standard hand tools are sufficient.
Does 106-0397 include a catalytic converter?
No. The 106-0397 replaces the muffler and exhaust pipe from the catalytic converter outlet rearward. The catalytic converter is not included.
What years does 106-0397 fit?
MagnaFlow 106-0397 fits the 1989, 1990, and 1991 Toyota 4Runner with the 3.0L V6 engine. It does not fit the 1992 and later 4Runner models, which use a different part number.
What material is the 106-0397 piping?
The system uses aluminized steel construction, which provides corrosion resistance suitable for daily-driven vehicles in most climates.
What is the warranty on MagnaFlow 106-0397?
MagnaFlow covers 106-0397 with a two-year, unlimited-mileage warranty against defects in materials and workmanship.
Does the system include exhaust hangers?
The 106-0397 does not include hangers but does include mounting brackets and is designed to use the factory rubber hanger mounts on the 1989 to 1991 Toyota 4Runner.
Is professional installation recommended for 106-0397?
The 106-0397 is designed for DIY installation with basic automotive knowledge. MagnaFlow recommends professional installation if you are not comfortable with exhaust work.
What OEM parts does 106-0397 replace?
MagnaFlow 106-0397 interchanges with Toyota factory part numbers 17430-YZZG2 and 17430-YZZP6.
Installation Instructions
- Allow the vehicle exhaust to cool completely before beginning work.
- Safely raise and support the vehicle on jack stands.
- Remove the factory exhaust from the catalytic converter flange rearward, unclipping all hanger mounts.
- Clean the catalytic converter outlet flange surface and inspect for damage.
- Position the new ring gasket onto the catalytic converter outlet flange.
- Loosely assemble the 106-0397 sections, routing the system to align with the factory hanger locations.
- Insert the U-bolt clamp at the slip joint and hand-tighten to allow final position adjustment.
- Clip all hanger brackets to the factory rubber mounts, confirming clearance from the floor pan and fuel lines.
- Torque all fasteners to specification and tighten the flange bolts evenly to avoid gasket distortion.
- Start the vehicle and inspect for exhaust leaks at all joints before lowering the vehicle.
Proposition 65 Warning
WARNING: This product can expose you to chemicals including carbon monoxide and other combustion byproducts, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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