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ES#4164626 - B9NONRESONATED - Cat-Back Exhaust - Non 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 - Non 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#:
4164626
Mfg#:
B9NONRESONATED
Select Your Vehicle
Add to Wish List

Cat-Back Exhaust - Non Resonated

Starting at: $3156.71
SALE: 3591.99
Starting at: $3156.71
WAS: $3991.99 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
Selected Options
Availability:
Ships Directly From Supplier
Est. Ship Date:
in 3 Business Days
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Cat-Back Exhaust System - Non-Resonated (Louder)
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
3240929 SSXAU656
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% $3991.99

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

3591.99
Cat-Back Exhaust System - Non-Resonated (Louder)
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
3240938 SSXAU657
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% $4158.99

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

3742.22
Cat-Back Exhaust System - Non-Resonated (Louder)
2.50" stainless steel with quad GT-90 cerakote black tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240936 SSXAU658
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% $3759.99

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

3383.98
Cat-Back Exhaust System - Non-Resonated (Louder)
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
3240940 SSXAU659
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% $3742.99

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

3368.57
Cat-Back Exhaust System - Non-Resonated (Louder)
2.50" stainless steel with quad GT-100 polished tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
3466847 SSXAU700
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% $3507.99

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

3156.71
B9 S4/S5 Cat-Back Exhaust System - Non-Resonated (Louder)
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
3466846 SSXAU701
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% $3507.99

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

3156.71
Cat-Back Exhaust System - Non-Resonated (Louder)
2.50" stainless steel with quad GT-100 titanium trim
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
3466849 SSXAU702
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% $3948.99

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

3553.47
Cat-Back Exhaust System - Non-Resonated (Louder)
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
3466845 SSXAU703
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% $4406.99

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

3965.63
Cat-Back Exhaust System - Non-Resonated (Louder)
2.50" stainless steel with quad polished oval tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential
Milltek Sport
3466850 SSXAU704
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% $3742.99

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

3368.57
Cat-Back Exhaust System - Non-Resonated (Louder)
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
3466844 SSXAU705
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% $3991.99

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

3591.99
Cat-Back Exhaust System - Non-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
4140187 SSXAU722
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% $3875.99

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

3487.99
Cat-Back Exhaust - Non Resonated
2.50" stainless steel and quad Carbon Jet-100 Tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport
4159846 SSXAU724
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% $3875.99

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

3487.99
Cat-Back Exhaust - Non Resonated
2.50" stainless steel and quad Carbon Jet-100 Tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport
4159846 SSXAU724
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% $3875.99

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

3487.99
Cat-Back Exhaust - Resonated
2.50" stainless steel and quad Carbon Jet-100 Tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Milltek Sport
4159852 SSXAU723
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
Cat-Back Exhaust System - Non-Resonated (Louder)
2.50" stainless steel with quad GT-100 polished tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240933 SSXAU650
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% $3507.99

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

3156.71
Cat-Back Exhaust System - Non-Resonated (Louder)
2.50" stainless steel with quad GT-100 carakote black tips
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240932 SSXAU651
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% $3507.99

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

3156.71
Cat-Back Exhaust System - Non-Resonated (Louder)
2.50" stainless steel with quad GT-100 titanium trim
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
Milltek Sport
3240934 SSXAU652
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% $3948.99

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

3553.47
Cat-Back Exhaust System - Non-Resonated (Louder)
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
3240930 SSXAU653
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% $4406.99

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

3965.63
Cat-Back Exhaust System - Non-Resonated (Louder)
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
3240935 SSXAU654
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% $4414.99

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

3973.34
Cat-Back Exhaust System - Non-Resonated (Louder)
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
3240937 SSXAU655
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% $3511.99

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

3160.57

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 Use vehicle selector to confirm fitment
Audi B9 S5 Quattro 3.0T Sportback Use vehicle selector to confirm fitment
Audi B9 S5 Quattro 3.0T Cabriolet 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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