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Audi S4 Engine Parts & Accessories

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JHM Fuel Pump Upgrade Kit - High-Flow 340 LPH w/ Drop-In Adapter

ES#4045937 - B5340LPFP - JHM Fuel Pump Upgrade Kit - High-Flow 340 LPH w/ Drop-In Adapter - Drop in kit to work in conjunction with your factory fuel system - JH Motorsports - Audi

Drop in kit to work in conjunction with your factory fuel system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
JH Motorsports - Corporate Logo
ES#:
4045937
Mfg#:
B5340LPFP
Ships in 2 Business Days
$399.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Ignition Service Kit

ES#4475295 - 06M905606F2KT - Performance Ignition Service Kit - Includes six Blue APR coil packs and OEM spark plugs to service your ignition system - Assembled By ECS - Audi

Includes six Blue APR coil packs and OEM spark plugs to service your ignition system 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#:
4475295
Mfg#:
06M905606F2KT
In Stock
$398.63 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Atmospheric Dump Valve - Polished Silver

ES#4726975 - FMDV13A-C - Atmospheric Dump Valve - Polished Silver - Prevent boost leaks with full billet construction - Forge - Audi

Prevent boost leaks with full billet construction affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Forge - Corporate Logo
ES#:
4726975
Mfg#:
FMDV13A-C
Back Ordered
Auto Notify
$278.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

APR Valve Spring Kit - Priced Per Spring

ES#4690063 - MS100258 - APR Valve Spring Kit - Priced Per Spring - Lighter, stiffer, and supports higher revving! - APR - Audi Volkswagen

Lighter, stiffer, and supports higher revving! Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4690063
Mfg#:
MS100258
In Stock
11% off MSRP

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

$69.99

This product was last offered at the strikethrough price on
06-19-2026

$61.99 USD
Free Shipping

Oil Pan - Lower

ES#4504896 - 06E103604K - Oil Pan - Lower - Replace your cracked or broken pan - Rein - Audi Volkswagen

Replace your cracked or broken pan 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:
Rein - Corporate Logo
ES#:
4504896
Mfg#:
06E103604K
In Stock
$107.99

This product was last offered at the strikethrough price on
04-24-2026

$67.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Throttle Body Assembly - priced each

ES#284935 - 079133062C - Throttle Body Assembly - priced each - Includes the throttle position sensor - Genuine Volkswagen Audi - Audi Volkswagen

Includes the throttle position sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
284935
Mfg#:
079133062C
Ships in 3 Business 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.

$1453.99

This product was last offered at the strikethrough price on
06-19-2026

$1391.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ARP Head Stud Kit

ES#2975695 - 204-4105 - ARP Head Stud Kit - High-strength cylinder head stud set - ARP - Audi

High-strength cylinder head stud set affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ARP - Corporate Logo
ES#:
2975695
Mfg#:
204-4105
In Stock at Vendor
$463.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Gas Cap

ES#4845970 - 8K0201550N - Gas Cap - Includes seal and retaining strap - Bremmen Parts - Audi

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

Brand:
Bremmen Parts - Corporate Logo
ES#:
4845970
Mfg#:
8K0201550N
In Stock
ON SALE! SAVE 19%
$31.99

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

$25.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Temperature Sensor With O-Ring & Clip - 4 Pin

ES#2866095 - 059919501AS1 - Coolant Temperature Sensor With O-Ring & Clip - 4 Pin - Updated Green sensor with square/round connector. Please check existing sensor color - Febi - Audi Volkswagen

Updated <font color='green'>Green</font> sensor with square/round connector. Please check existing sensor color 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#:
2866095
Mfg#:
059919501AS1
In Stock
$14.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated

ES#2827370 - SSXAU240 - Cat-Back Exhaust System - Non-Resonated - 2.37" stainless steel with dual black Cerakote oval tips - Milltek Sport - Audi

2.37" stainless steel with dual black Cerakote oval tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Up to the 2012 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827370
Mfg#:
SSXAU240
Ships in 3 Business Days
$2771.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#253082 - 3B0121321 - Expansion Tank Cap - Keep proper pressure in your coolant system - Genuine Volkswagen Audi - Audi Volkswagen

Keep proper pressure in your coolant system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
253082
Mfg#:
3B0121321
In Stock
25% off MSRP

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

$39.59

This product was last offered at the strikethrough price on
01-08-2026

$29.67 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

A/C Pressure Switch

ES#4145078 - 4H0959126B - A/C Pressure Switch - Prevents excess pressure from building within the system - Mahle - Audi

Prevents excess pressure from building within the system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mahle - Corporate Logo
ES#:
4145078
Mfg#:
4H0959126B
In Stock
$80.99

This product was last offered at the strikethrough price on
03-06-2026

$73.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sport & Sound Cat-Back Exhaust System - Resonated

ES#3514254 - 764440 - Sport & Sound Cat-Back Exhaust System - Resonated - Stainless steel resonated cat-back exhaust system with dual round, polished tips - Supersprint - Audi

Stainless steel resonated cat-back exhaust system with dual round, polished tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supersprint - Corporate Logo
ES#:
3514254
Mfg#:
764440
In Stock
Limited Qty Sale
$3055.99

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

$2734.99 USD
Free Shipping

B9 S4/S5 Charge Pipe Kit

ES#4159029 - CTS-IT-292 - B9 S4/S5 Charge Pipe Kit - 2.5" diameter piping to increase your throttle response and decrease turbo lag - CTS - Audi

2.5" diameter piping to increase your throttle response and decrease turbo lag affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
4159029
Mfg#:
CTS-IT-292
Ships in 7 Business Days
ON SALE! SAVE 15%
$199.99

This product was last offered at the strikethrough price on
06-08-2026

$169.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Camshaft Adjuster Unit - Priced Each

ES#284546 - 079109087N - Camshaft Adjuster Unit - Priced Each - Fits left and right side - Genuine Volkswagen Audi - Audi

Fits left and right side affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
284546
Mfg#:
079109087N
Ships in 7 Business Days
5% off MSRP

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

$1427.99

This product was last offered at the strikethrough price on
06-19-2026

$1354.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Timing Belt Kit - Ultimate Plus With Cam Locking Tool

ES#7439 - 078198670 - Timing Belt Kit - Ultimate Plus With Cam Locking Tool - Our most complete timing belt kit with coolant - Assembled By ECS - Audi

Our most complete timing belt kit with coolant 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#:
7439
Mfg#:
078198670
In Stock at Vendor
ON SALE! SAVE 13%
$623.99

This product was last offered at the strikethrough price on
01-03-2026

$541.93 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

Let us help you find the parts that fit your Audi

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