SKU: 15218383378

2003 Hummer H2 6.0L Direct-Fit Catalytic Converter 4451218 Magnaflow

Sale price$432.00 Regular price$480.00
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 26 - Jul 31

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Description

2003 Hummer H2 6.0L Direct-Fit Catalytic Converter 4451218 MagnaflowOverview: Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct Fit Catalytic Converter 4451218. With features including free flowing mandrel bent tubing and highly corrosion resistant, stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state of the art metrology department uses the latest 3D scanning systems during research

Overview:

Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 4451218. With features including free-flowing mandrel-bent tubing and highly corrosion resistant, stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency. This direct-fit catalytic converter is designed specifically for the 2003 Hummer H2. The included gaskets & hardware reduce the possibility of a leaking seal while avoiding the need to reuse corroded factory parts for installation. This replacement part is designed to meet or exceed California Air Resource Board requirements, and has undergone additional testing to be certified by CARB for legal use in CA/CARB restricted states for the listed vehicles.

Interchange:
Brand  Interchange Part Number

Application:

Year Make Model Submodel Engine Size
2003 Hummer H2 6L/V8

Specs:

Heat Shield Attached No
Mounting Hardware Included Yes
Overall Length (In.) 48.375
Sensor Port Count 2
Substrate Material Ceramic
Main Piping Diameter 2.5
Gasket Included Yes
Series California
Subtitle California / CARB Compliant
Title California Direct-Fit
Finish Stainless Steel
Type Direct-Fit
Converter Quantity 1
Outlet Attachment Clamp-On
Clamp Included Yes
Air Tube Adaptable No
Oxygen Sensor Location Pre and Post Converter
Material Stainless Steel
Hangers Included No
Inlet Attachment Bolt-On
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 15218383378

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4.6 ★★★★★
Based on 18 reviews
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C
Verified Purchase
Coreen Jurson
Waukegan, US
★★★★★ 5
Love it!
Size: 5-Tier (Not included planks), Size: 5-Tier (Not included planks)
Years later it is still holding up! Don’t mind the mess! Worth it! Good size! And once it was up it was easy to put together! Love the style!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 26, 2025
J
Verified Purchase
JESSICA
Chelsea, US
★★★★★ 5
Easily assembled.
Size: 3Pack of 5 Tier (Not included planks)
Easily assembled, seems sturdy and built to last. Once attached to wall seems even sturdier than expected. Anchor pieces included but I choose to find studs to anchor to.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 12, 2025
J
Verified Purchase
James Collier
Birmingham, US
★★★★★ 3
Good but misleading size
Size: 3Pack of 5 Tier (Not included planks)
Sturdy set for shelving. However dimensions are misleading. Not sure if they sent the incorrect size but the vertical distance between shelves was 11” and that’s without the shelving installed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
S
Verified Purchase
Sara
Birmingham, US
★★★★★ 5
Worked for pantry
Size: 3Pack of 5 Tier (Not included planks), Size: 3Pack of 5 Tier (Not included planks)
These turned out perfect t for a pantry. Just fyi get better dry wall anchors and you’re golden! Definitely takes two people to put up tho!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 14, 2026
H
Verified Purchase
Heather Kay Wingo
Chelsea, US
★★★★★ 5
Great for school
Format: Paperback
Most of my class work came from this book. Honestly non biased and informative.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 11, 2023

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