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Audi S4 Performance Exhaust Parts

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Downpipe Hardware Kit

ES#2580177 - N044512530801KT - Downpipe Hardware Kit - Contains all of the hardware you need to install new downpipes on your Audi 4.2 engine - Assembled By ECS - Audi

Contains all of the hardware you need to install new downpipes on your Audi 4.2 engine affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2580177
Mfg#:
N044512530801KT
In Stock
ON SALE! SAVE 25%
$39.99

This product was last offered at the strikethrough price on
05-02-2026

$29.97 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal Single Exhaust Tip - 3.5" - Single Wall Black

ES#5457388 - VTDTIPSW2535BLK - Universal Single Exhaust Tip - 3.5" - Single Wall Black - 2.5" Inlet - 3.5" Outlet - Single Wall Black - Valvetronic Designs - Audi BMW Volkswagen Mercedes Benz MINI Porsche

2.5" Inlet - 3.5" Outlet - Single Wall Black affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Valvetronic Designs - Corporate Logo
ES#:
5457388
Mfg#:
VTDTIPSW2535BLK
Ships in 1 Business Day
$79.99 USD
Free Shipping
Scratch and Dent Item

Audi B5 A4/S4 B6/B7 A4/S4 Skid Plate Assembly *Scratch And Dent*

ES#5339655 - 030456LA01 - Audi B5 A4/S4 B6/B7 A4/S4 Skid Plate Assembly *Scratch And Dent* - Scratch & Dent - Audi

ALL SALES FINAL. ITEMS MAY BE DAMAGED OR MISSING COMPONENTS. PLEASE SEE IMAGES BEFORE PURCHASING. Want To Haggle? Give Us A Call Or Chat To Make An Offer On This Product! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Scratch & Dent - Corporate Logo
ES#:
5339655
Mfg#:
030456LA01
No longer available

66.5MM Exhaust Clamp - Priced Each

ES#3199866 - CHC66.5SS - 66.5MM Exhaust Clamp - Priced Each - Stainless band clamp used in various Milltek Sport exhaust systems - 66.5mm - Milltek Sport - Audi

Stainless band clamp used in various Milltek Sport exhaust systems - 66.5mm affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Milltek Sport - Corporate Logo
ES#:
3199866
Mfg#:
CHC66.5SS
Ships on Jun 24, 2026
Auto Notify
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

GT100 Exhaust Black Cerakote Tips - Left

ES#2960889 - MSAU603 - GT100 Exhaust Black Cerakote Tips - Left - 100mm GT style exhaust tip set for the Left side of the vehicle - Milltek Sport - Audi

100mm GT style exhaust tip set for the Left side of the vehicle affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Milltek Sport - Corporate Logo
ES#:
2960889
Mfg#:
MSAU603
Ships in 3 Business Days
$293.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Downpipe Installation Kit

ES#2576064 - 8D0253115FKT1 - Downpipe Installation Kit - Install new hardware with your downpipe - Assembled By ECS - Audi

Install new hardware with your downpipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2576064
Mfg#:
8D0253115FKT1
In Stock
ON SALE! SAVE 14%
$123.99

This product was last offered at the strikethrough price on
05-02-2026

$106.40 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

73MM Exhaust Clamp - Priced Each

ES#3143291 - CHC73SS - 73MM Exhaust Clamp - Priced Each - Stainless band clamp used in various Milltek Sport exhaust systems - 73mm - Milltek Sport - Audi

Stainless band clamp used in various Milltek Sport exhaust systems - 73mm affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Milltek Sport - Corporate Logo
ES#:
3143291
Mfg#:
CHC73SS
In Stock
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust Installation Kit

ES#2598287 - 357253141AKT5 - Cat-Back Exhaust Installation Kit - Includes both clamps to connect your cat-back exhaust system - HJS - Audi

Includes both clamps to connect your cat-back exhaust system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
HJS - Corporate Logo
ES#:
2598287
Mfg#:
357253141AKT5
In Stock
$25.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Resonated Center Section - Right Side

ES#3184655 - MSAU177 - Resonated Center Section - Right Side - Replacement right side resonated center section for your Milltek Exhaust system - Milltek Sport - Audi

Replacement right side resonated center section for your Milltek Exhaust system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
To be used with Milltek Sport exhaust systems SSXAU37, SSXAU46, SSXAU100, SSXAU296 (Or to make your existing non-resonated system SSXAU38, SSXAU48, SSXAU

Brand:
Milltek Sport - Corporate Logo
ES#:
3184655
Mfg#:
MSAU177
Ships in 3 Business Days
$187.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Resonated Center Section - Left Side

ES#3184656 - MSAU178 - Resonated Center Section - Left Side - Replacement left side resonated center section for your Milltek Exhaust system - Milltek Sport - Audi

Replacement left side resonated center section for your Milltek Exhaust system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
To be used with Milltek Sport exhaust systems SSXAU37, SSXAU46, SSXAU100, SSXAU296 (Or to make your existing non-resonated system SSXAU38, SSXAU48, SSXAU

Brand:
Milltek Sport - Corporate Logo
ES#:
3184656
Mfg#:
MSAU178
Ships in 3 Business Days
$187.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

GT100 Cerakote Black Exhaust Tip - Priced Each

ES#3191401 - MSVW372-1 - GT100 Cerakote Black Exhaust Tip - Priced Each - 100mm GT style exhaust tip for the left and or right side of the vehicle - Milltek Sport - Audi

100mm GT style exhaust tip for the left and or right side of the vehicle affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Milltek Sport - Corporate Logo
ES#:
3191401
Mfg#:
MSVW372-1
In Stock
$88.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

79MM Exhaust Clamp - Priced Each

ES#3143288 - CHC79SS - 79MM Exhaust Clamp - Priced Each - Milltek Sport - Audi

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

Brand:
Milltek Sport - Corporate Logo
ES#:
3143288
Mfg#:
CHC79SS
In Stock
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal Exhaust Tip - 3.5" - Priced Each

ES#2974336 - 35225 - Universal Exhaust Tip - 3.5" - Priced Each - Double wall stainless steel. 2.5" inlet, 3.5" outlet. - Magnaflow - Audi Volkswagen

Double wall stainless steel. 2.5" inlet, 3.5" outlet. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Not vehicle specific. You MUST measure prior to purchasing!

Brand:
Magnaflow - Corporate Logo
ES#:
2974336
Mfg#:
35225
Ships in 1 Business Day
$82.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Non-Resonated Center Section - Left Side

ES#3646694 - MSAU178REP - Non-Resonated Center Section - Left Side - Replacement left side non-resonated center section for your Milltek Exhaust system - Milltek Sport - Audi

Replacement left side non-resonated center section for your Milltek Exhaust system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
To be used with Milltek Sport exhaust systems SSXAU038, SSXAU048, SSXAU295 (Or to make your existing resonated system SSXAU296 into a non-resonated exhau

Brand:
Milltek Sport - Corporate Logo
ES#:
3646694
Mfg#:
MSAU178REP
Ships in 3 Business Days
$136.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Non-Resonated Center Section - Right Side

ES#3646693 - MSAU177REP - Non-Resonated Center Section - Right Side - Replacement right side non-resonated center section for your Milltek Exhaust system - Milltek Sport - Audi

Replacement right side non-resonated center section for your Milltek Exhaust system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
To be used with Milltek Sport exhaust systems SSXAU038, SSXAU048, SSXAU295 (Or to make your existing resonated system SSXAU296 into a non-resonated exhau

Brand:
Milltek Sport - Corporate Logo
ES#:
3646693
Mfg#:
MSAU177REP
Ships in 3 Business Days
$136.99 USD
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Exhaust Parts

Performance exhaust systems increase flows to improve throttle response and add power. Designed to reduce back pressure, our large selection of performance exhaust parts and performance exhaust systems is made from premium materials like stainless steel. Many are TIG welded and polished to make them as attractive as they are functional.

Let us help you find the parts that fit your Audi

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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