SKU: 16102287141

Catalytic Converter for 2000-2004 Audi A6 Quattro 4.2L MagnaFlow 51664

Sale price$282.60 Regular price$314.00
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

Catalytic Converter for 2000-2004 Audi A6 Quattro 4.2L MagnaFlow 51664Overview: Keep the check engine light off with MagnaFlow OEM Grade Federal EPA Compliant Direct Fit Catalytic Converter 51664. 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 OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51664. 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. Designed to fit the 2000-2004 Audi A6 Quattro and 2002-2003 Audi S6, this direct-fit catalytic converter also interchanges with OE parts 4B3 254 550 GX, 4B3 253 058 BX, among others.

Note : Not For Sale in California

Interchange:

Brand  Interchange Part Number
Audi 4B3 253 058 AX
Audi 4B3 253 058 BX
Audi 4B3 254 550 CX
Audi 4B3 254 550 GX
Audi 4B3253058AX
Audi 4B3253058BX
Audi 4B3254550CX
Audi 4B3254550GX
Audi 4B3 253 058 AX
Audi 4B3 253 058 BX
Audi 4B3 254 550 CX
Audi 4B3 254 550 GX
Audi 4B3253058AX
Audi 4B3253058BX
Audi 4B3254550CX
Audi 4B3254550GX

Application:

Year Make Model Submodel Engine Size
2000 - 2004 Audi A6 Quattro 4.2L/V8
2002 - 2003 Audi S6 4.2L/V8

Specs:

Oxygen Sensor Location Pre and Post Converter
Overall Length (In.) 51
Substrate Material Ceramic
Air Tube Adaptable No
Converter Quantity 1
Inlet Attachment Bolt-On
Material Stainless Steel
Outlet Attachment Clamp-On
Finish Stainless Steel
Series OEM Grade
Main Piping Diameter (In.) 2.25
Subtitle Federal / EPA Compliant
Title OEM Grade Direct-Fit
Type Direct-Fit
Body Material Stainless Steel
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: 16102287141

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4.1 ★★★★★
Based on 8 reviews
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Product Reviews
J
Verified Purchase
jessica n James mcaleavey
New York, US
★★★★★ 5
Just like the picture
Size: 7", Size: 7"
Super cute and fun my puppies love it! It’s one of their go to’s
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 2, 2025
C
Verified Purchase
Carlo
Omaha, US
★★★★★ 1
Not recommended
Size: 7"
Terrible.. It didn't last 20 min.smh
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
S
Verified Purchase
Sharon C
Boise, US
★★★★★ 5
Enjoyed by puppy
Excellent puppy teether. Stands up to games of tug-o-war, satisfies the need for chewing on the "bone" and she likes it when it's been cooled. I wet the fabric part before popping it in the fridge. So far, it's held up well to her sharp puppy teeth. Definitely a repeat purchase item.
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Reviewed in the United States on October 21, 2025
C
Verified Purchase
Customer
Battle Creek, US
★★★★★ 5
Puppy is obsessed, so are my adult dogs!
These were a life saver while my puppy was teething. He absolutely LOVED these and somehow the little cloth attached to it held up extremely well. I'm not sure if it was the textures or the flavor/scent but this was by far his favorite toy. He's 6 months now and will always run to this. Our adult dogs have accidentally gotten ahold of these a few times and it holds up well to them too (thankfully). Super soft and great to also throw in the freezer to soothe their teeth while teething. This is a great value and if it's something that keeps the pup occupied, I'm all for it!
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Reviewed in the United States on November 14, 2022
J
Verified Purchase
Jayda P
Grantham, US
★★★★★ 4
Probably best for medium to large dogs
I got these for my teething Japanese Chin pups & they can’t really chew the blue part because it’s too large for small dogs. I usually just barely wet the rag & wrap treats up inside, tucking it inside itself before freezing to make something more enriching for them. They like it overall.
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Reviewed in the United States on September 8, 2023

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