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Audi B9 A5 Quattro 2.0T Coupe

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ES#4164540 - B9RESONATED - Cat-Back Exhaust - Resonated - 2.50" stainless steel with your choice of tip style - Milltek Sport - Audi
The above image is for illustrative purposes only.
Select options below.

Cat-Back Exhaust - Resonated

2.50" stainless steel with your choice of tip style
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport
Milltek Sport
ES#:
4164540
Mfg#:
B9RESONATED
Select Your Vehicle
Add to Wish List

Cat-Back Exhaust - Resonated

Starting at: $3116.70
SALE: 3377.24
Starting at: $3116.70
WAS: $3752.99 on 07-01-2026

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


Sale Save 10%
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This product is lifetime replacement eligible
This product is backed by our
Lifetime Replacement Program! Read more here
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Availability:
Ships Directly From Supplier
Est. Ship Date:
in 3 Business Days
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Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT100 polished tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240919 SSXAU640
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% $3752.99

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

3377.24
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT-100 Cerakote black tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240918 SSXAU641
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% $3752.99

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

3377.24
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT100 titanium tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240920 SSXAU642
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% $4193.99

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

3774.00
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT-100 burnt titanium tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3236278 SSXAU643
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% $4651.99

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

4186.16
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT-90 polished tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240924 SSXAU644
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% $3756.99

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

3381.09
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT90 cerakote black tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240923 SSXAU645
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% $4005.99

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

3604.51
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT-90 titanium tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240925 SSXAU646
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% $4403.99

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

3962.75
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT90 burnt titanium tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240921 SSXAU647
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% $4659.99

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

4193.87
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad polished oval tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240928 SSXAU648
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% $3987.99

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

3589.10
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad Cerakote black velvet oval tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3236155 SSXAU649
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% $4236.99

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

3812.52
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT100 polished tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
3466841 SSXAU694
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% $3752.99

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

3377.24
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT-100 Cerakote black tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
3466840 SSXAU695
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% $3752.99

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

3377.24
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT100 titanium tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
3466842 SSXAU696
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% $4193.99

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

3774.00
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad GT-100 burnt titanium tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
3466839 SSXAU697
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% $4651.99

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

4186.16
Cat-Back Exhaust System - Resonated With Exhaust Valves **OPEN BOX** - (NO LONGER AVAILABLE)
2.50" stainless steel with quad polished oval tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport
3466843 SSXAU698
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
3116.70
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad Cerakote black velvet oval tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
3466838 SSXAU699
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% $4236.99

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

3812.52
Cat-Back Exhaust System - Resonated With Exhaust Valves
2.50" stainless steel with quad Carbon Fiber Jet 100 tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
4140184 SSXAU721
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% $4120.99

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

3708.51

This Part Fits the Following Vehicles

Make Model Submodel Engine Special Fitment Notes
Audi B9 S4 Quattro 3.0T Use vehicle selector to confirm fitment
Audi B9 S5 Quattro 3.0T Sportback 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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