Exhaust› Catalytic Converters

GM Performance Parts

Direct-Fit Catalytic Converter

$495.99

SKU: 8-03-12/ 16346

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Walker 16346 is a direct-fit catalytic converter designed for stock replacement. It features a stainless steel converter case and a monolithic catalyst substrate, with an integrated heat shield. It fits models up to 11,000 lbs. GVW.
Show original supplier description
The Walker 16346 is a direct-fit catalytic converter built with a durable stainless steel converter case and a monolithic catalyst substrate. It includes a heat shield for added protection and longevity. Constructed with 409 stainless steel shells and 16-gauge stainless steel pipes and nipples, the Walker 16346 ensures robust construction. It utilizes a heat-resistant sealed mat for efficient operation. This catalytic converter is a direct replacement for OE units, intended for installation with minimal modification. This converter is suitable for vehicles weighing up to 11,000 lbs. GVW.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGM Performance Parts
Part Number8-03-12/ 16346
CategoryExhaust

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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