SKU: 5803866648

Catalytic Converter for 2004-2009 Audi S4 4.2L OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter MagnaFlo

Sale price$457.20 Regular price$508.00
Save 10%

Pay in installments of $127.00 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 1 - Aug 6

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Catalytic Converter for 2004-2009 Audi S4 4.2L OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter MagnaFloOverview: Keep the check engine light off with MagnaFlow OEM Grade Federal EPA Compliant Direct Fit Catalytic Converter 49918. 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 49918. 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 2004-2009 Audi S4 and interchanges with OE parts 8E0 254 551 QX and 8E0 254 554 QX.

Note : Not For Sale in California

Interchange:

Brand  Interchange Part Number
Audi 8E0 254 551 QX
Audi 8E0 254 554 QX
Audi 8E0254551QX
Audi 8E0254554QX
Audi 8E0 254 551 QX
Audi 8E0 254 554 QX
Audi 8E0254551QX
Audi 8E0254554QX

Application:

Year Make Model Submodel Engine Size
2004 - 2009 Audi S4 4.2L/V8

Specs:

Body Material Stainless Steel
Overall Length (In.) 48.3
Title OEM Grade Direct-Fit
Substrate Material Ceramic
Air Tube Adaptable No
Converter Quantity 2
Inlet Attachment Bolt-On
Material Stainless Steel
Finish Stainless Steel
Type Direct-Fit
Main Piping Diameter (In.) 2.5
Subtitle Federal / EPA Compliant
Oxygen Sensor Location Pre and Post Converter
Series OEM Grade
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: 5803866648

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.0 ★★★★★
Based on 27 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
D
Verified Purchase
David
Natrona Heights, US
★★★★★ 5
Great product
Color: Gold-blue
It is a very handsome watch. Looks like it will withstand the abuse i do to everything. Price was great, delivery was early and it looks better in person. Great deal.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 3, 2026
D
Verified Purchase
David
Port Orchard, US
★★★★★ 4
Good value
Color: Gold-blue
As advertised hard to adjust band but attractive functional
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 25, 2026
K
Verified Purchase
Keith
Los Angeles, US
★★★★★ 5
Acceptable quality!
Color: Gold-blue
Works great- band kind of flimsy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
A
Verified Purchase
Amazon Customer
Houston, US
★★★★★ 1
band will not adjust.
Color: Gold-blue
Can't adjust band. Instructions say push pin out in direction of arow, with tool supplied. Pin does not move, tool bends. pins have screw slots tool only has round push. Shame I liked the look of watch but wonder about quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
A
Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 5
very expensive looking, like a rolex. But very large had to remove several links.
Color: Gold-blue
Luckily, I know a friend who is a watch guy or else this length is for a really big wristed guy. The look is great, left it a tad loose so it doesnt catch on my wrist hairs, and it isn't so thats good. Very sleek and Rolex looking. The glass is faceted too, to give a prism look. Great buy and price. Wanted an inexpensive yet everyday watch from metal and this does the job. Almost looks too rich now I am afraid to wear it in Los Angeles LMFAO.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 10, 2025

recommand products