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Audi B9 S5 Quattro 3.0T Cabriolet

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Audi B9 S5 Quattro 3.0T Cabriolet Performance Engine Parts

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Water Wetter Coolant Additive - 12oz

ES#261427 - 80204 - Water Wetter Coolant Additive - 12oz - Reduces coolant temperatures by as much as 30*F - Redline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Reduces coolant temperatures by as much as 30*F

Brand:
Redline - Corporate Logo
ES#:
261427
Mfg#:
80204
In Stock
$15.99 USD
Free Shipping
on orders $49 and up

IE Midpipe Exhaust Upgrade

ES#4489116 - IEEXCK4 - IE Midpipe Exhaust Upgrade - Aggressive sound, quality finish, reliable operation, straightforward install, and affordable fun. - Integrated Engineering - Audi

Aggressive sound, quality finish, reliable operation, straightforward install, and affordable fun. 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#:
4489116
Mfg#:
IEEXCK4
In Stock
$804.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

HJS Tuning 2.5" High-Flow ECE Downpipes

ES#3508359 - SSXAU725 - HJS Tuning 2.5" High-Flow ECE Downpipes - Featuring HJS Tuning 200cpsi ECE-approved sports cat - Fits with OE and Milltek cat-back systems. - Milltek Sport - Audi

Featuring HJS Tuning 200cpsi ECE-approved sports cat - Fits with OE and Milltek cat-back systems.

Brand:
Milltek Sport - Corporate Logo
ES#:
3508359
Mfg#:
SSXAU725
Ships in 6 Business Days
$5244.99

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

$5244.07 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BOSS800 Hybrid Turbocharger

ES#5435523 - TR-2251 - BOSS800 Hybrid Turbocharger - Blending OEM drivability with Tier 1 supercar power. - CTS - Audi

Blending OEM drivability with Tier 1 supercar power.

Brand:
CTS - Corporate Logo
ES#:
5435523
Mfg#:
TR-2251
Ships in 8 Business Days
$2499.99 USD
Free Shipping

Audi B9 S5 Coupe/Cabriolet 3.0T Valved Exhaust System With Downpipes & Resonator Delete Kit

ES#4876129 - 016752LAEBKT - Audi B9 S5 Coupe/Cabriolet 3.0T Valved Exhaust System With Downpipes & Resonator Delete Kit - Includes stainless steel valved cat-back section, black billet aluminum tunnel brace, 4" black chrome exhaust tips, and a set of downpipes with resonator deletes! - Enthusiast Bundles - Audi

Includes stainless steel valved cat-back section, black billet aluminum tunnel brace, 4" black chrome exhaust tips, and a set of downpipes with resonator deletes! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4876129
Mfg#:
016752LAEBKT
In Stock
ON SALE! SAVE 38%
$2529.91

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

$1568.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Performance Software - Stage 1+ - With UniCONNECT+ Cable

ES#4375901 - 30T-EA839-1+-UC - Unitronic Performance Software - Stage 1+ - With UniCONNECT+ Cable - Gain up to 100 horsepower and 112 lb-ft of torque on 93 Octane - Unitronic - Audi

Gain up to 100 horsepower and 112 lb-ft of torque on 93 Octane This tune can be performed at home with the included UniCONNECT+ cable. Only available for purchase in th

Brand:
Unitronic - Corporate Logo
ES#:
4375901
Mfg#:
30T-EA839-1+-UC
In Stock
$1064.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated (Louder)

ES#3240938 - SSXAU657 - Cat-Back Exhaust System - Non-Resonated (Louder) - 2.50" stainless steel with quad GT-90 titanium tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-90 titanium tips Fits models without factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3240938
Mfg#:
SSXAU657
Ships in 6 Business Days
$4158.99

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

$4158.02 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ultimate Turbocharger Installation Kit

ES#4736499 - 06M133026AKT - Ultimate Turbocharger Installation Kit - All hardware required for a successful install utilizing genuine components. - Assembled By ECS - Audi

All hardware required for a successful install utilizing genuine components. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4736499
Mfg#:
06M133026AKT
Ships in 9 Business Days
ON SALE!
$238.99

This product was last offered at the strikethrough price on
04-15-2026

$237.35 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust - Non Resonated

2.50" stainless steel with your choice of tip style

Brand:
Milltek Sport - Corporate Logo
ES#:
4164626
Mfg#:
B9NONRESONATED
Ships in 5 Business Days
Starting at $3507.46 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bosch 044 High Flow Fuel Pump - 270 LPH

ES#514125 - 0580254044 - Bosch 044 High Flow Fuel Pump - 270 LPH - Great for when more fuel is needed in a custom fueling application - Bosch - Audi Volkswagen

Great for when more fuel is needed in a custom fueling application We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
514125
Mfg#:
0580254044
In Stock
$230.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated With Exhaust Valves

ES#3240918 - SSXAU641 - Cat-Back Exhaust System - Resonated With Exhaust Valves - 2.50" stainless steel with quad GT-100 Cerakote black tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-100 Cerakote black tips Fits models without factory rear sports differential
For vehicles without a sport differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3240918
Mfg#:
SSXAU641
Ships in 6 Business Days
$3752.99

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

$3752.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

X34 Carbon Fiber Full Intake System

ES#4005393 - 034-108-1029 - X34 Carbon Fiber Full Intake System - Delivers improved power, sound, and acceleration to B9 Audi S4/S5 owners in a clean OEM+ package! - 034Motorsport - Audi

Delivers improved power, sound, and acceleration to B9 Audi S4/S5 owners in a clean OEM+ package! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4005393
Mfg#:
034-108-1029
Ships in 3 Business Days
$1201.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated With Valves

ES#3493658 - SSXAU686 - Cat-Back Exhaust System - Non-Resonated With Valves - 2.50" stainless steel with quad GT100 cerakote black tips - Milltek Sport - Audi

2.50" stainless steel with quad GT100 cerakote black tips Fits models without factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3493658
Mfg#:
SSXAU686
Ships in 6 Business Days
$3506.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Engine Parts

Our name says it all. That's why ECS Tuning is dedicated to providing our customers with the broadest possible assortment of engine tuning options at a range of prices and options to fit any budget. Start small and grow your car into something special with performance engine upgrades from a company that has tuning in its name and its blood.

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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