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Cat-Back Exhaust System - Non-Resonated

2.25" stainless steel with your choice of tip style
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport
Milltek Sport
ES#:
4164715
Mfg#:
B6S4NONRESONATED
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Cat-Back Exhaust System - Non-Resonated

Starting at: $1337.61
SALE: 1337.61
Starting at: $1337.61
WAS: $1486.99 on 07-01-2026

This product was last offered at the strikethrough price on
07-01-2026


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Cat-Back Exhaust System - Non-Resonated
2.25" stainless steel with dual Jet 100mm polished tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2827255 SSXAU038
Availability:
Ships Directly From Supplier
Est. Ship Date:
in 3 Business Days
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 10% $1486.99

This product was last offered at the strikethrough price on
07-01-2026

1337.61
Cat-Back Exhaust System - Non-Resonated
2.25" stainless steel with dual 100mm 'Jet' style cerakote black tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
4164708 SSXAU872
Availability:
Ships Directly From Supplier
Est. Ship Date:
in 3 Business Days
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 10% $1614.99

This product was last offered at the strikethrough price on
07-01-2026

1453.17
Cat-Back Exhaust System - Non-Resonated
2.25" stainless steel with dual GT 100mm Cerakote black trims
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
4164704 SSXAU873
Availability:
Ships Directly From Supplier
Est. Ship Date:
in 3 Business Days
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 10% $1616.99

This product was last offered at the strikethrough price on
07-01-2026

1455.09

Product Details

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Performance to blow your mind, not your ears! Improve performance and your vehicle's sound with this cat-back exhaust system from Milltek.
Milltek engineers took on the task of finding the perfect balance between maximum performance increase and a responsible noise level in each and every system, to appeal to enthusiasts of all levels. All products are direct replacements for factory exhaust systems, meaning no modifications are required for proper fitment.

This cat-back exhaust system is manufactured of a 2.25" T304 anti-magnetic stainless steel that is less susceptible to discolouration when compared to other systems found on the market. This quality T304 stainless steel is used on all of the pipework including the construction of the mufflers and resonators. Mandrel bending ensures full flow bends for better exhaust gas flow and Milltek systems are increased in bore to ensure the ultimate performance without the loss of mid-range torque. 

Kit Includes:

  • Non-resonated mid pipe
  • Dual exit rear mufflers
  • Installation hardware


All Milltek cat-back exhaust systems are covered under a limited lifetime warranty to the original purchaser for anti-corrosion and manufacturer defects.

This Part Fits the Following Vehicles

Make Model Submodel Engine Special Fitment Notes
Audi B6 A4 FWD V6 30v Use vehicle selector to confirm fitment
Audi B6 A4 Quattro V6 30v Use vehicle selector to confirm fitment
Audi B6 S4 All V8 Use vehicle selector to confirm fitment
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.
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