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Audi B5 S4 2.7T

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Audi B5 S4 2.7T Engine Intake Parts

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Universal performance air filter

ES#1876583 - E-2021 - Universal performance air filter - Bolt on better performance and fuel efficiency. - K&N - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Bolt on better performance and fuel efficiency.

Brand:
K&N - Corporate Logo
ES#:
1876583
Mfg#:
E-2021
In Stock
$68.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

AEM Water/Methanol Injection System

ES#4500516 - 30-3326 - AEM Water/Methanol Injection System - High-Flow Low-Current WMI Solenoid - 200PSI 1/8in-27NPT In/Out - AEM Electronics - Audi BMW Volkswagen MINI Porsche

High-Flow Low-Current WMI Solenoid - 200PSI 1/8in-27NPT In/Out

Brand:
AEM Electronics - Corporate Logo
ES#:
4500516
Mfg#:
30-3326
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.

$149.99

This product was last offered at the strikethrough price on
08-19-2026

$132.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Billet R1 Diverter Valve - Pair

ES#4039652 - dv100001KT - Billet R1 Diverter Valve - Pair - Less maintenance, more boost. Kit includes two valves for twin-turbo applications. - APR - Audi Porsche

Less maintenance, more boost. Kit includes two valves for twin-turbo applications. Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4039652
Mfg#:
DV100001KT
In Stock
$583.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Pro-Line Throttle Valve Cleaner - 400mL

ES#3514640 - 20210KT - Pro-Line Throttle Valve Cleaner - 400mL - Removes contamination and deposits in the intake and throttle valve area - Liqui-Moly - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Removes contamination and deposits in the intake and throttle valve area 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat! This item is classified as Hazardous Materials and requires special shipping and handling. We cannot ship this item out of the US

Brand:
Liqui-Moly - Corporate Logo
ES#:
3514640
Mfg#:
20210KT
In Stock
$19.99 USD
Free Shipping
on orders $49 and up

ECS Exact-Fit High Flow Air Filter - Dry

ES#4461006 - 012054LA18-DRY - ECS Exact-Fit High Flow Air Filter - Dry - High flow filter replacement to get your engine breathing better than new! - ECS - Audi Volkswagen

High flow filter replacement to get your engine breathing better than new! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4461006
Mfg#:
012054LA18-DRY
Ships on Oct 26, 2026
Auto Notify
ON SALE! SAVE 25%
$71.99

This product was last offered at the strikethrough price on
06-13-2026

$53.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turbosmart Gen-V Race Port BOV - Black

ES#4007248 - TS-0204-1132 - Turbosmart Gen-V Race Port BOV - Black - The Race Port is famous for being an amazingly small and light BOV for turbocharged competition level engines - TurboSmart - Audi Volkswagen

The Race Port is famous for being an amazingly small and light BOV for turbocharged competition level engines *General use blow off valve for custom big turbo applications - Not a direct fit valve*

Brand:
TurboSmart - Corporate Logo
ES#:
4007248
Mfg#:
TS-0204-1132
In Stock at Vendor
$335.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Diverter Valve

ES#4818434 - 06A145710P - Diverter Valve - A great upgrade for stock to mildly tuned engines - Bremmen Parts - Audi Volkswagen

A great upgrade for stock to mildly tuned engines 10X Entries For Our 25th Anniversary Sweepstakes!

2 required

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818434
Mfg#:
06A145710P
In Stock
ON SALE! SAVE 20%
$41.99

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

$33.45 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

VC-30 Water Methanol Controller (Boost)

ES#4623922 - SN0-60400 - VC-30 Water Methanol Controller (Boost) - Proportionally injects more or less water/methanol according to boost pressure - SnowPerformance - Audi BMW Volkswagen MINI

Proportionally injects more or less water/methanol according to boost pressure

Brand:
SnowPerformance - Corporate Logo
ES#:
4623922
Mfg#:
SN0-60400
In Stock at Vendor
$184.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Silicone Y-Pipe Hose Pair

ES#2864562 - 034-108-3002 - Silicone Y-Pipe Hose Pair - Reinforced high-temp silicone for long life and abuse resistance - 034Motorsport - Audi

Reinforced high-temp silicone for long life and abuse resistance

Brand:
034Motorsport - Corporate Logo
ES#:
2864562
Mfg#:
034-108-3002
In Stock
ON SALE! SAVE 10%
$158.00

This product was last offered at the strikethrough price on
08-17-2026

$142.20 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Pro Dry S Air Filter

ES#518084 - 31-10044 - Pro Dry S Air Filter - Higher flow, higher performance - oil-free, washable and reuseable! - AFE - Audi BMW Volkswagen

Higher flow, higher performance - oil-free, washable and reuseable!

Brand:
AFE - Corporate Logo
ES#:
518084
Mfg#:
31-10044
In Stock at Vendor
20% off MSRP

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

$121.99

This product was last offered at the strikethrough price on
08-19-2026

$97.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

K&N Air Filter Cleaning Kit - Aerosol

ES#3491802 - 99-5000KT - K&N Air Filter Cleaning Kit - Aerosol - Preserve & maintain your air filter for a lifetime like it was designed to use - K&N - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Preserve & maintain your air filter for a lifetime like it was designed to use This item is classified as Hazardous Materials and requires special shipping and handling. We cannot ship this item out of the US or with priority shippi

Brand:
K&N - Corporate Logo
ES#:
3491802
Mfg#:
99-5000KT
In Stock
$24.00

This product was last offered at the strikethrough price on
05-27-2026

$23.99 USD
Free Shipping
on orders $49 and up

Filter Cleaning Kit

ES#3245340 - EVE-FLC - Filter Cleaning Kit - For Eventuri Intake Systems and many other performance air filters - Eventuri - Audi BMW Volkswagen MINI

For Eventuri Intake Systems and many other performance air filters

Brand:
Eventuri - Corporate Logo
ES#:
3245340
Mfg#:
EVE-FLC
Ships in 4 Business Days
$30.00 USD
Free Shipping
on orders $49 and up

Billet MAF Housing - Hitachi Style (late) 85mm ID

ES#2864568 - 034-108-6007 - Billet MAF Housing - Hitachi Style (late) 85mm ID - Perfect for use in upgraded turbo cars with larger injectors and appropriate software - 034Motorsport - Audi

Perfect for use in upgraded turbo cars with larger injectors and appropriate software Fits models with Hitachi style MAF sensor - From the 2001 model year

Brand:
034Motorsport - Corporate Logo
ES#:
2864568
Mfg#:
034-108-6007
In Stock
ON SALE! SAVE 10%
$180.00

This product was last offered at the strikethrough price on
08-17-2026

$162.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Hemi Throttle Body - 80mm

ES#5448029 - 53032801AC - Hemi Throttle Body - 80mm - The perfect solution for a high horsepower set ups - SMP - Audi Volkswagen

The perfect solution for a high horsepower set ups

Brand:
SMP - Corporate Logo
ES#:
5448029
Mfg#:
53032801AC
In Stock
$200.99

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

$187.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Intake Parts

All engine performance begins with engine breathing. That's why we have a large inventory of stock and performance intake manifolds, and related intake manifold parts, including MAF sensors, intake hoses, cold air intake systems, and engine air filters for both normally aspirated and forced induction engines. To perform it's best, your engine needs to breathe clean and breathe free.

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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