Audi S4 Performance Engine Parts

Performance kit composed of a careful selection of our best sellers, offering valuable performance gains at a 'bang for the buck' price point affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:

ES#:

4017073

Mfg#:

B5C527TPPLVL1KT

$586.99 USD

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Lifetime Replacement

A healthy bump in horsepower and torque across the entire RPM range - Includes APR drive pulley, APR installation tool, and correct length drive belt 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!
APR Stage II software is required to run any upgraded Pulley configuration and is sold separately - Vehic

Brand:

ES#:

3219340

Mfg#:

MS100135KT

$583.99 USD

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Lifetime Replacement

Oil free and allows significant airflow improvement over stock affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:

ES#:

264117

Mfg#:

31-10118

20% off MSRP

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

$121.25

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

$97.00 USD

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Lifetime Replacement

Stock sized valve head diameter, factory triple groove keeper setup - Includes Supertech valves and IE valve seals affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
*Existing factory triple-groove valve keepers are to be reused*

Brand:

ES#:

3647476

Mfg#:

ST-AEVI-1103KT1

$573.24 USD

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on orders $49 and up

Lifetime Replacement

The Gen-V WG50 Pro-Gate50 external wastegate is a cost effective, high performing 50mm external wastegate. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
*General use wastegate for custom, externally gated big turbo applications - Not a direct fit wastegate*

Brand:

ES#:

4007256

Mfg#:

TS-0554-1012

Upgrade to the ultimate pulley setup! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Appropriate stage 2 software is required for use

Brand:

ES#:

4056965

Mfg#:

025509ECS01KT1

$572.99 USD

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Lifetime Replacement

Replacement air filter for the X34 Cold Air Intake (034-108-1002) affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:

ES#:

4858330

Mfg#:

034-108-B013

Proprietary tune box designed specifically for the EA839 3.0L TFSI with gains of +40 Horsepower / 70 ft-lb of Torque! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:

ES#:

4906476

Mfg#:

64.02.09

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

Brand:

ES#:

2972925

Mfg#:

30-3350

$562.99 USD

Add to Cart

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on orders $49 and up

Lifetime Replacement

Stock sized valve head diameter, factory triple groove keeper setup - Includes Supertech valves and IE valve seals affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
*Existing factory triple-groove valve keepers are to be reused*

Brand:

ES#:

3647478

Mfg#:

ST-AIVN-1103KT1

$559.99 USD

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on orders $49 and up

Lifetime Replacement

Pairs with all types of coolant to increase heat transfer and decrease engine temps. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:

ES#:

2764643

Mfg#:

MMRALC

$22.99 USD

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on orders $49 and up

Lifetime Replacement

Choose the stage that meets your power goals! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next

Brand:

ES#:

4465107

Mfg#:

4.2-5V

Starting at $550.00 USD

Customize

Lifetime Replacement

Choose the stage that meets your power goals! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next

Brand:

ES#:

4464667

Mfg#:

2.7T-5VT

Starting at $550.00 USD

Customize

Lifetime Replacement

These billet o-ring sealed flanges seamlessly adapt your iE Turbo Inlet Pipe directly to the TTE720 inlets. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:

ES#:

4880963

Mfg#:

IEINDA2-TTE720

$109.99 USD

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on orders $49 and up

Lifetime Replacement

Average gain of 50 horsepower and 59 lb-ft of torque on 91 Octane affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
TCU required for all vehicles equipped with Automatic Transmission

Brand:

ES#:

3097339

Mfg#:

27T-250-1

$549.00 USD

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Lifetime Replacement

New OEM "710N" bypass valve with reinforced rubber diaphragm for longer use than other plastic valves. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2 required

Brand:

ES#:

4880731

Mfg#:

034-145-5001

$91.00 USD

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Lifetime Replacement