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Audi S4 Engine Parts & Accessories

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Supersprint Cat-Back Exhaust System - Non-Resonated

ES#4017775 - 777512KT - Supersprint Cat-Back Exhaust System - Non-Resonated - Stainless steel non-resonated cat-back exhaust system with quad round, polished tips - Includes secondary cat delete downpipes - Supersprint - Audi

Stainless steel non-resonated cat-back exhaust system with quad round, polished tips - Includes secondary cat delete downpipes affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supersprint - Corporate Logo
ES#:
4017775
Mfg#:
777512KT
Back Ordered
$7461.99 USD
Free Shipping

Supertech Stainless Steel Valve Kit

ES#4315245 - st-aivn-1106s2KT - Supertech Stainless Steel Valve Kit - +1mm oversized valve head diameter, single groove keeper setup for high RPM use - Supertech - Audi

+1mm oversized valve head diameter, single groove keeper setup for high RPM use affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
*Oversized valves require extra machine work to the cylinder head.*

Brand:
Supertech - Corporate Logo
ES#:
4315245
Mfg#:
ST-AIVN-1106S2KT
Back Ordered
$1202.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Valve Cover - Left

ES#5376302 - 06E103471P - Valve Cover - Left - For cylinder 4-6 and includes the gasket and bolts - URO - Audi

For cylinder 4-6 and includes the gasket and bolts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
URO - Corporate Logo
ES#:
5376302
Mfg#:
06E103471P
Back Ordered
$162.01 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/Pressure Control Valve (PCV)

ES#4780878 - 06M103515H - Oil Separator/Pressure Control Valve (PCV) - Also known as the "PCV". Located on the valve cover - Vaico - Audi

Also known as the "PCV". Located on the valve cover affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4780878
Mfg#:
06M103515H
Special Order: No Guaranteed ETA
$131.99 USD
Free Shipping
on orders $49 and up

Vacuum Check Valve

ES#2878682 - 078611933B - Vacuum Check Valve - Multiple line check valve that sits in the back of the intake manifold - Vaico - Audi

Multiple line check valve that sits in the back of the intake manifold affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Automatic Transmission Vehicles - Up To VIN 8D-1-053000, Split is in the 2001 model year - Manual Transmission Vehicles - Works on all model years

Brand:
Vaico - Corporate Logo
ES#:
2878682
Mfg#:
078611933B
Special Order: No Guaranteed ETA
$16.99 USD
Free Shipping
on orders $49 and up

Diverter Valve

ES#2878542 - 06A145710P - Diverter Valve - Cure the boost leak and restore power - Vaico Q+ - Audi Volkswagen

Cure the boost leak and restore power affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Vaico Q+ - Corporate Logo
ES#:
2878542
Mfg#:
06A145710P
Special Order: No Guaranteed ETA
$62.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Fan Clutch

ES#2899093 - 4A0121350B - Radiator Fan Clutch - Stay cool at traffic lights. - Vemo - Audi

Stay cool at traffic lights. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Vemo - Corporate Logo
ES#:
2899093
Mfg#:
4A0121350B
Special Order: No Guaranteed ETA
$62.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Alternator Kit

Keep your charging system operating at full potential, includes hardware! 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#:
4818211
Mfg#:
06E903024L2KT
Back Ordered
$909.99

This product was last offered at the strikethrough price on
05-07-2026

$883.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Engine Mount Kit

Includes both engine mounts 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#:
4810430
Mfg#:
4M0199371GM2KT
Back Ordered
ON SALE!
$470.99

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

$431.98 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Starter

Revive your ignition system 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!
For vehicles with Bosch style starters from production date 6/11/2013

Brand:
Bosch - Corporate Logo
ES#:
3419451
Mfg#:
06E911021F
Back Ordered
$648.99

This product was last offered at the strikethrough price on
05-07-2026

$630.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Shouldered Hex Nut - Priced Each

Install new hardware with your new parts. M8 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Used to secure the engine mounts (upper position)

Brand:
Bremmen Parts - Corporate Logo
ES#:
4992163
Mfg#:
N01508315
Special Order: No Guaranteed ETA
Auto Notify
ON SALE! SAVE 46%
$2.99

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

$1.62 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87C

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

Brand:
Bremmen Parts - Corporate Logo
ES#:
4940301
Mfg#:
078121113F
Special Order: No Guaranteed ETA
Auto Notify
ON SALE! SAVE 18%
$16.99

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

$13.86 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Knock Sensor - Blue (390mm)

Keep your engine running smoothly affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits left rear only

Brand:
FAE - Corporate Logo
ES#:
2862833
Mfg#:
079905377H
Back Ordered
$56.99

This product was last offered at the strikethrough price on
05-07-2026

$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Filter Housing 194030

Replace the broken of leaking filter housing affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Febi - Corporate Logo
ES#:
5375509
Mfg#:
06M115401L
Special Order: No Guaranteed ETA
$258.99

This product was last offered at the strikethrough price on
04-21-2026

$136.99 USD
Free Shipping
on orders $49 and up

Crankshaft/Camshaft Position Sensor

Also referred to as the impulse sender affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Hitachi - Corporate Logo
ES#:
4708251
Mfg#:
057906433B
Back Ordered
$51.99

This product was last offered at the strikethrough price on
05-07-2026

$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Supply Line - Left

Connects the oil distributor to the turbocharger affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Automatic transmission only

Brand:
Original Equipment Supplier - Corporate Logo
ES#:
2609349
Mfg#:
078145777C
Back Ordered
5% off MSRP

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

$275.00

This product was last offered at the strikethrough price on
06-18-2026

$260.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime 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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Manufacturer names and/or part numbers are used only for identification purposes.

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