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Audi B5 S4 2.7T

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Audi B5 S4 2.7T Engine Turbocharger Parts

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RS4 K04 Turbochargers - Complete Kit

ES#3658989 - 53049880025/26KT - RS4 K04 Turbochargers - Complete Kit - Comprehensive kit includes the left & right side RS4 K04 turbochargers, 034Motorsport RS4 Inlet Pipe set, and associated installation hardware - Assembled By ECS - Audi

Comprehensive kit includes the left & right side RS4 K04 turbochargers, 034Motorsport RS4 Inlet Pipe set, and associated installation hardware 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3658989
Mfg#:
53049880025/26KT
Ships in 2 Business Days
$3718.00

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

$3715.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Silicone Throttle Body Boot - Black

ES#2864571 - 034-112-6007-BLA - Silicone Throttle Body Boot - Black - Replaces the troublesome and weak "Y" boot - Includes clamps - 034Motorsport - Audi

Replaces the troublesome and weak "Y" boot - Includes clamps

Brand:
034Motorsport - Corporate Logo
ES#:
2864571
Mfg#:
034-112-6007-BLA
In Stock
ON SALE! SAVE 10%
$107.00

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

$96.30 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Self-Locking Nut - Priced Each

ES#2588753 - N90369001 - Self-Locking Nut - Priced Each - Install new hardware with your new parts. M10x1.5 - Rein - Audi BMW Volkswagen

Install new hardware with your new parts. M10x1.5 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Used to secure the catalyst/downpipe to the turbo

Brand:
Rein - Corporate Logo
ES#:
2588753
Mfg#:
N90369001
In Stock
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

710N Diverter Valve - Priced Each

ES#2804306 - 06A145710NKT - 710N Diverter Valve - Priced Each - A great upgrade for stock to mildly tuned engines. Includes band clamps - Assembled By ECS - Audi Volkswagen

A great upgrade for stock to mildly tuned engines. Includes band clamps 10X Entries For Our 25th Anniversary Sweepstakes!
2 required

Brand:
Assembled By ECS - Corporate Logo
ES#:
2804306
Mfg#:
06A145710NKT
In Stock
Auto Notify
ON SALE! SAVE 24%
$51.99

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

$39.73 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

RS4 K04 Turbochargers With Install Kit

ES#3247798 - 5304988002526KT - RS4 K04 Turbochargers With Install Kit - Includes the left (K04-025) & right (K04-026) side turbochargers with associated installation hardware - Assembled By ECS - Audi

Includes the left (K04-025) & right (K04-026) side turbochargers with associated installation hardware 10X Entries For Our 25th Anniversary Sweepstakes!
Does NOT include the RS4 or modified intake pipes necessary for a complete install - For a bolt-on solution, please see 034Motorsport's inlet pipe kit 034-145-P002 (ES2864575).

Brand:
Assembled By ECS - Corporate Logo
ES#:
3247798
Mfg#:
5304988002526KT
Ships in 2 Business Days
$3214.00

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

$3211.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

RS4 K04 Turbochargers

ES#4164822 - 5304988002526KT3 - RS4 K04 Turbochargers - Includes the left (K04-025) & right (K04-026) side turbochargers - BorgWarner - Audi

Includes the left (K04-025) & right (K04-026) side turbochargers Does NOT include hardware or the RS4/modified intake pipes necessary for a complete install - For a bolt-on solution, please see 034Motorsport's inlet pipe kit 034-145-P002 (ES2864575).

Brand:
BorgWarner - Corporate Logo
ES#:
4164822
Mfg#:
5304988002526KT3
Ships in 1 Business Day
$3070.99

This product was last offered at the strikethrough price on
07-02-2026

$3067.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Garrett GTX3584RS Turbocharger

ES#3691644 - 856804-5003S - Garrett GTX3584RS Turbocharger - Garrett GTX3584RS Turbocharger; V-Band Inlet and V-Band Outlet Turbine Housing; 1.21 A/R. Garrett # 856804-5003S - Garrett - Audi Volkswagen MINI

Garrett GTX3584RS Turbocharger; V-Band Inlet and V-Band Outlet Turbine Housing; 1.21 A/R. Garrett # 856804-5003S Used for custom, big turbo applications only - ECS Tuning does not offer support on tuning, fueling, exhaust manifold, etc

Brand:
Garrett - Corporate Logo
ES#:
3691644
Mfg#:
856804-5003S
Ships in 6 Business Days
$2881.99 USD
This product is lifetime replacement eligible Lifetime Replacement

TTE380+ Turbo Upgrade - B5 S4 & C5 A6 2.7T

ES#4630656 - TTE10041 - TTE380+ Turbo Upgrade - B5 S4 & C5 A6 2.7T - Designed to put out over 400HP! - The Turbo Engineers - Audi

Designed to put out over 400HP! Custom tuning software required for installation.

Brand:
The Turbo Engineers - Corporate Logo
ES#:
4630656
Mfg#:
TTE10041
Back Ordered
$2699.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

SXV T9302 Recirculating Bypass Valve

ES#4907811 - T9302 - SXV T9302 Recirculating Bypass Valve - Direct-fit performance solution for the weak factory diverter valve - Go Fast Bits - Audi Volkswagen Porsche

Direct-fit performance solution for the weak factory diverter valve

Brand:
Go Fast Bits - Corporate Logo
ES#:
4907811
Mfg#:
T9302
In Stock
$178.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

8mm High Strength Stainless Exhaust Manifold Stud (50mm Length) - Priced Each

ES#4858164 - 034-105-A009 - 8mm High Strength Stainless Exhaust Manifold Stud (50mm Length) - Priced Each - Can be used for exhaust systems, turbo, and any use where the highest strength and quality are required. - 034Motorsport - Audi Volkswagen

Can be used for exhaust systems, turbo, and any use where the highest strength and quality are required.

Brand:
034Motorsport - Corporate Logo
ES#:
4858164
Mfg#:
034-105-A009
In Stock
ON SALE! SAVE 10%
$10.00

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

$9.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Silicone Y-Pipe Hose Pair - RS4

ES#2864560 - 034-108-3000 - Silicone Y-Pipe Hose Pair - RS4 - Direct replica of OEM RS4 hoses, but in reinforced silicone for long life and abuse resistance - 034Motorsport - Audi

Direct replica of OEM RS4 hoses, but in reinforced silicone for long life and abuse resistance To be used with RS4 Y-pipe and inlet pipes only

Brand:
034Motorsport - Corporate Logo
ES#:
2864560
Mfg#:
034-108-3000
In Stock
ON SALE! SAVE 10%
$210.00

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

$189.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Manual Boost Controller - Black - Mini

ES#1832074 - FMICB051 - Manual Boost Controller - Black - Mini - In-car boost controller for fine tuning - Forge - Audi Volkswagen MINI Porsche

In-car boost controller for fine tuning

Brand:
Forge - Corporate Logo
ES#:
1832074
Mfg#:
FMICB051
In Stock
$78.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

K03 Replacement Kit

ES#259912 - S4K03 - K03 Replacement Kit - Restore boost and get going! - Assembled By ECS - Audi

Restore boost and get going! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
259912
Mfg#:
S4K03
Back Ordered
$2477.00

This product was last offered at the strikethrough price on
08-13-2026

$2458.58 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

K03 Turbocharger - Left

ES#259913 - 078145701S - K03 Turbocharger - Left - Restore boost and get going! - BorgWarner - Audi

Restore boost and get going!

Brand:
BorgWarner - Corporate Logo
ES#:
259913
Mfg#:
078145701S
Back Ordered
$1166.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

WG38 Gen V Ultra-Gate 38 - 14PSI - Blue

ES#3970381 - TS-0551-1011 - WG38 Gen V Ultra-Gate 38 - 14PSI - Blue - Bolt on external wastegate from Turbosmart - TurboSmart - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Bolt on external wastegate from Turbosmart

Brand:
TurboSmart - Corporate Logo
ES#:
3970381
Mfg#:
TS-0551-1011
In Stock at Vendor
10% off MSRP

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

$430.99

This product was last offered at the strikethrough price on
08-21-2026

$387.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Turbocharger Parts

Whether you're repairing an existing turbo or adding one, ECS Tuning has turbos, turbo kits, and all the turbocharger hardware and valving you need to turn forced induction into added power.

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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