Description
Product Overview
The Walker Catalytic Converter model 15858 is a direct‑fit, bolt‑on replacement designed for 1998‑1999 Isuzu Hombre, Chevrolet S10 and GMC Sonoma trucks. Constructed with a machined exterior and thick OE‑style flanges, the unit incorporates an aluminized heat shield that mirrors original equipment designs, protecting the undercarriage from excessive heat. The converter utilizes a high‑technology washcoat and an optimal precious‑metal load to meet stringent emissions standards, while remaining EPA compliant for OBDII vehicles manufactured from 1996 onward. Weighing 10 pounds and measuring 33 x 14.9 x 8 inches, this converter balances robust construction with manageable size for straightforward installation.
Usage
Designed for everyday driving conditions, this converter excels in both city commuting and highway travel, delivering consistent emissions reduction across varied engine loads. Ideal for owners of the specified model years who require a reliable replacement after wear or failure, the direct‑fit design eliminates the need for custom fabrication, welding, or extensive modifications. Whether you are a professional mechanic servicing a fleet or a DIY enthusiast restoring a single vehicle, the Walker converter provides a plug‑and‑play solution that integrates seamlessly with existing exhaust routing and heat‑shield configurations.

Why Choose Us
Walker brings decades of expertise in emissions control, ensuring each converter meets OEM specifications for performance and durability. Our converters feature a proprietary washcoat technology that maximizes catalytic efficiency, extending service life while maintaining compliance with federal emissions regulations. Each unit undergoes rigorous quality testing, guaranteeing that the flanges, hangers, and brackets retain structural integrity under high‑temperature conditions. With a 5‑star customer rating and a reputation for dependable fit, Walker provides confidence that the part will perform as intended without unexpected failures.
Key Features
- Direct‑fit bolt‑on design with OE‑style hangers for quick installation
- Machined exterior and thick flanges for superior strength and durability
- Aluminized heat shield matching original equipment to protect undercarriage
- High‑technology washcoat and optimal precious‑metal load for efficient emissions reduction
- EPA compliant for OBDII vehicles, meeting federal emissions standards
FAQ
Will this converter fit other vehicle years or models?
The Walker 15858 is engineered specifically for 1998‑1999 Isuzu Hombre, Chevrolet S10 and GMC Sonoma. While it may physically bolt onto similar chassis, we recommend verifying fitment through the vehicle identification number and consulting the compatibility guide before purchase.
Do I need to modify the exhaust system to install this converter?
No additional fabrication or welding is required. The unit includes OE‑style brackets, hangers, and routings that align with the factory exhaust layout, allowing a direct bolt‑on replacement.
Is this converter legal for use in all states?
The converter is EPA compliant for OBDII vehicles, which satisfies federal emissions requirements. However, some states have specific aftermarket converter regulations; please check local laws before installation.
How long can I expect the converter to last?
With proper maintenance and normal driving conditions, the Walker catalytic converter typically provides service life comparable to original equipment, often exceeding 80,000 miles before performance degradation.
Can I install the converter myself?
Yes. The direct‑fit design is intended for both professional technicians and experienced DIY owners. Basic hand tools are sufficient, and the installation process generally takes less than an hour.








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