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Audi C4 S4 Quattro 20v T Performance Engine & Drivetrain Parts

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Unitronic 3" Air Filter (Gen 1)

ES#4362289 - UH003-IN4 - Unitronic 3" Air Filter (Gen 1) - Unitronic - Audi Volkswagen

Brand:
Unitronic - Corporate Logo
ES#:
4362289
Mfg#:
UH003-IN4
Back Ordered
$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Garrett GEN2 GTX3076R Dual Ball Bearing turbocharger

ES#4135253 - GRT-TBO-K51 - Garrett GEN2 GTX3076R Dual Ball Bearing turbocharger - Garrett GEN2 GTX3076R dual ball bearing turbocharger with a T04E frame (4" inlet and 2" outlet compressor housing) and a .61 A/R Divided (Twin-scroll) V-Band Inlet and GT 3" V-Band outlet turbine housing (Ni-Resist Material). - ATP - Audi Volkswagen

Garrett GEN2 GTX3076R dual ball bearing turbocharger with a T04E frame (4" inlet and 2" outlet compressor housing) and a .61 A/R Divided (Twin-scroll) V-Band Inlet and GT 3" V-Band outlet turbine housing (Ni-Resist Material). Used for custom, big turbo applications only - ECS Tuning does not offer support on tuning, fueling, exhaust manifold, etc

Brand:
ATP - Corporate Logo
ES#:
4135253
Mfg#:
GRT-TBO-K51
Ships in 6 Business Days
$2265.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

008 Premium Diverter Valve - Anodized Black

ES#2224448 - FMDV008 - 008 Premium Diverter Valve - Anodized Black - Smaller, tougher and tuneable - Forge - Audi Volkswagen Porsche

Smaller, tougher and tuneable

Brand:
Forge - Corporate Logo
ES#:
2224448
Mfg#:
FMDV008
Back Ordered
ON SALE! SAVE 10%
$264.99

This product was last offered at the strikethrough price on
09-18-2026

$238.48 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

008 Premium Diverter Valve - 3 Way adjustable Vacuum Port - Alloy

ES#3619942 - FMDV008PA-S - 008 Premium Diverter Valve - 3 Way adjustable Vacuum Port - Alloy - Smaller, tougher and tuneable - Now with 3-way adjustable, 90-degree vacuum port - Forge - Audi Volkswagen Porsche

Smaller, tougher and tuneable - Now with 3-way adjustable, 90-degree vacuum port

Brand:
Forge - Corporate Logo
ES#:
3619942
Mfg#:
FMDV008PA-S
In Stock
ON SALE! SAVE 10%
$204.99

This product was last offered at the strikethrough price on
09-18-2026

$184.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

IE Calico Coated ACL Race Rod Bearing Set

ES#2793997 - CAL4B1606HC5 - IE Calico Coated ACL Race Rod Bearing Set - Real Deal Calico Coated Rod Bearings - Full set for 5 rods, standard clearance - Integrated Engineering - Audi

Real Deal Calico Coated Rod Bearings - Full set for 5 rods, standard clearance Buy Integrated Engineering Software from 9/3/26 - 9/30/26 for a chance to win your Software for FREE!

Brand:
Integrated Engineering - Corporate Logo
ES#:
2793997
Mfg#:
CAL4B1606HC5
Ships in 4 Business Days
$146.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Tuning Universal Catch Can Drain System

ES#3698456 - 003779ECS11 - ECS Tuning Universal Catch Can Drain System - Make draining your ECS or Turner Catch Can simple with this comprehensive kit - ECS - Audi Volkswagen MINI

Make draining your ECS or Turner Catch Can simple with this comprehensive kit 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3698456
Mfg#:
003779ECS11
In Stock
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

High Flow Fuel Pump - 255 LPH

ES#2189784 - PMPWINLINE - High Flow Fuel Pump - 255 LPH - Great for when more fuel is needed in a custom fueling application - Walbro - Audi BMW Volkswagen

Great for when more fuel is needed in a custom fueling application

Brand:
Walbro - Corporate Logo
ES#:
2189784
Mfg#:
PMPWINLINE
In Stock at Vendor
$139.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

340lph High Flow In-Tank Fuel Pump

ES#3604757 - 50-1000 - 340lph High Flow In-Tank Fuel Pump - AEM?s 340LPH High Flow In-Tank Fuel Pump is designed for high performance naturally aspirated and forced induction EFI vehicles. - AEM Electronics - Audi Volkswagen

AEM?s 340LPH High Flow In-Tank Fuel Pump is designed for high performance naturally aspirated and forced induction EFI vehicles. This is a general-use high flow fuel pump, not a direct plug-and-play swap in most applications

Brand:
AEM Electronics - Corporate Logo
ES#:
3604757
Mfg#:
50-1000
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.

$132.99

This product was last offered at the strikethrough price on
09-18-2026

$117.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

JE Performance Piston Set

ES#4000041 - 302229 - JE Performance Piston Set - Includes rings, wire locks, and wrist pins - 81.5mm Bore (0.50 oversize), 8.5:1 CR, 86.4mm stroke - JE Piston - Audi

Includes rings, wire locks, and wrist pins - 81.5mm Bore (0.50 oversize), 8.5:1 CR, 86.4mm stroke

Brand:
JE Piston - Corporate Logo
ES#:
4000041
Mfg#:
302229
Back Ordered
$1099.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

JE Performance Piston Set

Includes rings, wire locks, and wrist pins - 81.0mm Bore (stock), 8.5:1 CR, 86.4mm stroke

Brand:
JE Piston - Corporate Logo
ES#:
4000051
Mfg#:
302228
Back Ordered
$1099.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Adjustable Fuel Pressure Regulator

ES#4158836 - 034-106-5015 - Adjustable Fuel Pressure Regulator - Works as a replacement for most Bosch fuel pressure regulators. Adjustable from 3.3-5 BAR - 034Motorsport - Audi Volkswagen

Works as a replacement for most Bosch fuel pressure regulators. Adjustable from 3.3-5 BAR 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4158836
Mfg#:
034-106-5015
Ships in 2 Business Days
$129.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

400LPH High Flow Fuel Pump (AN Fittings)

ES#3603936 - 50-1005 - 400LPH High Flow Fuel Pump (AN Fittings) - Designed for high performance naturally aspirated and forced induction EFI vehicles - It can be installed externally or in-tank using optional hardware that is sold separately - AEM Electronics - Audi Volkswagen

Designed for high performance naturally aspirated and forced induction EFI vehicles - It can be installed externally or in-tank using optional hardware that is sold separately This is a general-use high flow fuel pump, not a direct plug-and-play swap in most application

Brand:
AEM Electronics - Corporate Logo
ES#:
3603936
Mfg#:
50-1005
In Stock at Vendor
9% off MSRP

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

$224.99

This product was last offered at the strikethrough price on
09-18-2026

$204.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

AP3 OBD2 UNIVERSAL CABLE

ES#4415272 - AP3-OBDII-CABLE- - AP3 OBD2 UNIVERSAL CABLE - Tidy up your cabin with the COBB OBDII Universal Cable! - CobbTuning - Audi BMW Volkswagen Porsche

Tidy up your cabin with the COBB OBDII Universal Cable!

Brand:
CobbTuning - Corporate Logo
ES#:
4415272
Mfg#:
AP3-OBDII-CABLE-
In Stock
$85.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Innovate LC-2 Wideband O2 Controller Kit

ES#4809696 - 38770 - Innovate LC-2 Wideband O2 Controller Kit - Includes Lambda cable & 8-foot sensor cable. - Innovate Motorsports - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Includes Lambda cable & 8-foot sensor cable.

Brand:
Innovate Motorsports - Corporate Logo
ES#:
4809696
Mfg#:
38770
In Stock at Vendor
$212.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CV-2 Grease with Moly - 14oz Tube

ES#2848014 - 80402 - CV-2 Grease with Moly - 14oz Tube - High performance grease for multiple applications - Redline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

High performance grease for multiple applications

Brand:
Redline - Corporate Logo
ES#:
2848014
Mfg#:
80402
In Stock
$17.99 USD
Free Shipping
on orders $49 and up

Stage 3+ Clutch Kit

ES#3090774 - SA603F - Stage 3+ Clutch Kit - Features a full faced, carbon semi-metallic disc with a torque rating of 506 ft/lbs - Spec Clutches - Audi

Features a full faced, carbon semi-metallic disc with a torque rating of 506 ft/lbs

Brand:
Spec Clutches - Corporate Logo
ES#:
3090774
Mfg#:
SA603F
Ships in 3 Business Days
$629.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Engine & Drivetrain Parts

Worn mounts, bushings, and other drivetrain components rob performance. Replace or upgrade your drivetrain with our extensive catalog of mounts, bushings, clutch kits, and more.

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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