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Audi S4 Most Popular Parts

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Universal Catalytic Converter - 2.5"

ES#4387 - 6906 - Universal Catalytic Converter - 2.5" - 2.5" inlet/outlet, 14" length of converter itself, 6" width & 4" height - Emico - Audi Volkswagen

2.5" inlet/outlet, 14" length of converter itself, 6" width & 4" height affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Emico - Corporate Logo
ES#:
4387
Mfg#:
6906
Ships in 6 Business Days
$97.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Arnott Airline Repair Kit

ES#4940881 - K-5667 - Arnott Airline Repair Kit - 8x 6mm PTC Union, 9m x 6mm Tubing, 1x Tubing Cutter - Arnott - Audi BMW Volkswagen Mercedes Benz Porsche

8x 6mm PTC Union, 9m x 6mm Tubing, 1x Tubing Cutter affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Arnott - Corporate Logo
ES#:
4940881
Mfg#:
K-5667
In Stock
$83.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Self-Locking Hex Nut - Priced Each

ES#10150 - N10272302 - Self-Locking Hex Nut - Priced Each - Install new hardware with your new parts. M10 - Genuine Volkswagen Audi - Audi

Install new hardware with your new parts. M10 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Secures the rear sway bar to the end links

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
10150
Mfg#:
N10272302
In Stock
$1.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water/Methanol Injection Kit - Multi Input

ES#2972925 - 30-3350 - Water/Methanol Injection Kit - Multi Input - Increase power and efficiency while decreasing combustion temperatures - AEM Electronics - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Increase power and efficiency while decreasing combustion temperatures affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For Naturally Aspirated Engines

Brand:
AEM Electronics - Corporate Logo
ES#:
2972925
Mfg#:
30-3350
In Stock at Vendor
11% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$658.99

This product was last offered at the strikethrough price on
06-26-2026

$584.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

80 Piece Vacuum Cap Assortment

ES#3613632 - TIT45252 - 80 Piece Vacuum Cap Assortment - Great for capping unused vacuum lines. - Titan - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Great for capping unused vacuum lines. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Titan - Corporate Logo
ES#:
3613632
Mfg#:
TIT45252
In Stock
$14.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

High Temperature CV Joint Grease - 90g Tube

ES#1483 - 252-0001 - High Temperature CV Joint Grease - 90g Tube - Enough grease to service one Outer boot - Febi - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Enough grease to service one Outer boot affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
1483
Mfg#:
252-0001
In Stock
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

10cm "Muscle" Universal Fender Flares - Pair

ES#3569533 - MS10 - 10cm "Muscle" Universal Fender Flares - Pair - ABS plastic universal fender flares that add 10cm of width per side - Clinched - Audi BMW Volkswagen Mercedes Benz MINI Porsche

ABS plastic universal fender flares that add 10cm of width per side affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Includes required installation hardware and length of gasket

Brand:
Clinched - Corporate Logo
ES#:
3569533
Mfg#:
MS10
Special Order: No Guaranteed ETA
$290.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Titanium Conical Seat Wheel Bolt - Set

Lightweight, corrosion resistant, high-performance lug bolts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
5482045
Mfg#:
025384ECS03KT
Ships on Aug 19, 2026
ON SALE!
$577.83 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Engine Oil (0w-40) - 1 Quart

ES#1897108 - 11104 - Engine Oil (0w-40) - 1 Quart - A fully synthetic ester formula that offers excellent wear protection across a wide range of operating conditions - Redline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

A fully synthetic ester formula that offers excellent wear protection across a wide range of operating conditions affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Redline - Corporate Logo
ES#:
1897108
Mfg#:
11104
Ships on Jul 15, 2026
$16.99 USD
Free Shipping
on orders $49 and up

Torque Angle Gauge - Bavarian Autosport

ES#3673938 - B8800099 - Torque Angle Gauge - Bavarian Autosport - Bav Auto Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

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

Brand:
Bav Auto Tools - Corporate Logo
ES#:
3673938
Mfg#:
B8800099
In Stock
ON SALE! SAVE 25%
$21.99

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

$16.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Quattro Gift Set

ES#473352 - ZAW355011A - Quattro Gift Set - Includes a key chain, license plate frame, and valve stem caps! - Genuine Volkswagen Audi - Audi

Includes a key chain, license plate frame, and valve stem caps! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
473352
Mfg#:
ZAW355011A
Ships in 1-2 days
4% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$75.00

This product was last offered at the strikethrough price on
06-26-2026

$71.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Schwaben European Hand Tool Starter Kit

ES#2953943 - 005981sch01aKT - Schwaben European Hand Tool Starter Kit - Quality hand tools to get you started on your European adventure - Schwaben - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

Quality hand tools to get you started on your European adventure affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Schwaben - Corporate Logo
ES#:
2953943
Mfg#:
005981SCH01AKT
Ships on Jul 21, 2026
Auto Notify
ON SALE! SAVE 18%
$347.93

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

$286.34 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

12" Magrail - Black

ES#4829945 - MR12BK - 12" Magrail - Black - Hold your sockets securely in place with a magnetic rail that matches their quality. - VIM Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Hold your sockets securely in place with a magnetic rail that matches their quality. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Does not include studs.

Brand:
VIM Tools - Corporate Logo
ES#:
4829945
Mfg#:
MR12BK
In Stock
$25.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal Flex Section (2.25 X 10) - Priced Each

ES#261225 - 8844 - Universal Flex Section (2.25 X 10) - Priced Each - Stainless steel flex section that measures 2.25 x 10 - Overall Length - Ansa - Audi Volkswagen

Stainless steel flex section that measures 2.25 x 10 - Overall Length affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Ansa - Corporate Logo
ES#:
261225
Mfg#:
8844
Ships in 9 Business Days
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Quart & Gallon Fluid Pump

ES#4370808 - W1139 - Quart & Gallon Fluid Pump - Unique double threaded cap fits both quart and gallon size containers. - Performance Tool - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Unique double threaded cap fits both quart and gallon size containers. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Performance Tool - Corporate Logo
ES#:
4370808
Mfg#:
W1139
Ships in 1-2 days
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

M16 Drain Plug Socket, 1/2" Drive

ES#8234 - scw3357 - M16 Drain Plug Socket, 1/2" Drive - Specifically designed to fit your 16mm transmission drain and check plug. - Schwaben - Audi Volkswagen
ECS Tuning recommends this product.

Specifically designed to fit your 16mm transmission drain and check plug. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Schwaben - Corporate Logo
ES#:
8234
Mfg#:
SCW3357
In Stock
ON SALE! SAVE 30%
$23.99

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

$16.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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