Exhaust› Catalytic Converters

MagnaFlow

Universal Stainless Steel Catalytic Converter

$188.18

SKU: 51174-LB

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

Constructed from durable stainless steel, it features single laser fusion welds to minimize leak potential and a compact, low-mass design for enhanced thermal efficiency. This catalytic converter is intended for use on Federal/EPA emissions systems for vehicles model year 2000 and earlier, or any model year vehicle with Federal/EPA emissions systems.
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Its universal design offers flexibility for fitment on a wide array of vehicles, requiring professional installation and welding. Constructed from high-strength 409 stainless steel tubing and 308 stainless steel MIG welds, this converter is built for exceptional corrosion resistance and a long service life. The stainless steel body and heat shield contribute to its durability. Its compact, lightweight design aids in installation, even in confined spaces, and the expertly formulated catalyst blend ensures optimal efficiency and emissions control. This catalytic converter meets EPA requirements and is intended for Federal/EPA emissions systems. It is not legal for sale or installation in California, Colorado, or New York. Professional installation is highly recommended due to its universal, cut-and-weld design.

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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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandMagnaFlow
Part Number51174-LB
CategoryExhaust
5,000+ Trusted brands
1M+ Enthusiasts
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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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