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
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

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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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Cheryl
Belleville, US
★★★★★ 5
Nice shelf!
Color: Black, Size: 2 in 1
I bought this shelf to put in the bathroom, I use it for putting wash cloths on the bottom shelf and a candle on the top shelf. It was easy to put together, and it was easy to hang. I did put polyurethane on the shelves, only so that, when I cleaned it, it would be easier to wipe. Everyone that sees it, likes it.
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Reviewed in the United States on July 8, 2025
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Frank Olender
Bozeman, US
★★★★★ 4
Very nice shelf for the bathroom.
Color: Rucstic Brown, Size: 2 in 1, Color: Rucstic Brown, Size: 2 in 1
The small screws that screw into the wood shelves strip very easily. Be careful. Had to use different longer screws. Went together fine.
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Reviewed in the United States on December 24, 2025
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Tay
Pawtucket, US
★★★★★ 5
Functional
Color: Black, Size: 2+1 Tier Size
Very functional and sturdy. The installation wasn’t bad at all, I used a level to assist. It looks great, and all my products look organized on it.
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Reviewed in the United States on June 21, 2025
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Verified Purchase
CB
Massapequa, US
★★★★★ 3
Sturdy & Easy to Assemble!
Color: Black, Size: 2 in 1
Does not come assembled - you must assemble it, and once you do, it leans a little forward due to the hanging screws being on the top but on the bottom. It looks as shown, although dimensions are slightly different than indicated. It is 12" wide x 5" deep, and I bought the one that said it was 18" wide by 4" deep. It's sturdy enough to hold hair products and toiletries, or a small plant. Overall decent for price.
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Reviewed in the United States on March 18, 2026
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Iraida Torres Cuba
Draper, US
★★★★★ 5
Muy práctico 👌
Color: Rucstic Brown, Size: 2+1 Tier Size, Color: Rucstic Brown, Size: 2+1 Tier Size
Muy práctico y fácil de armar e instalar.
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Reviewed in the United States on May 31, 2026

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