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Audi B8/B8.5 S5 Quattro V8 4.2L

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Audi B8/B8.5 S5 Quattro V8 4.2L Performance Engine Parts

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Cat-Back Exhaust System - ValveSonic

ES#2827520 - SSXAU403 - Cat-Back Exhaust System - ValveSonic - 2.37" stainless steel with quad 80mm polished tips - Milltek Sport - Audi

2.37" stainless steel with quad 80mm polished tips Fits both manual and automatic transmission models

Brand:
Milltek Sport - Corporate Logo
ES#:
2827520
Mfg#:
SSXAU403
Ships in 5 Business Days
ON SALE! SAVE 10%
$3249.00

This product was last offered at the strikethrough price on
08-29-2026

$2924.10 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Supersprint Center X-Pipe

ES#3024708 - 767113 - Supersprint Center X-Pipe - Remove center resonator and add performance - Supersprint - Audi

Remove center resonator and add performance

Brand:
Supersprint - Corporate Logo
ES#:
3024708
Mfg#:
767113
Ships on Dec 9, 2026
$1543.99 USD
Free Shipping

Performance Downpipe Kit

ES#3522595 - 767132KT2 - Performance Downpipe Kit - Features left & right T304 Mandrel bent stainless steel downpipes with 200 cell high-flow catalytic converters - Supersprint - Audi

Features left & right T304 Mandrel bent stainless steel downpipes with 200 cell high-flow catalytic converters

Brand:
Supersprint - Corporate Logo
ES#:
3522595
Mfg#:
767132KT2
Ships in 3 Business Days
$4737.99 USD
Free Shipping

Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 2 Mufflers

ES#5457424 - UVM63MMDUALOUTX2 - Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 2.5" (63mm) - 2 Mufflers - Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button - Valvetronic Designs - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:
Valvetronic Designs - Corporate Logo
ES#:
5457424
Mfg#:
UVM63MMDUALOUTX2
Ships in 1 Business Day
ON SALE! SAVE 10%
$599.99

This product was last offered at the strikethrough price on
08-25-2026

$539.99 USD
Free Shipping

Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 1 Muffler

ES#5457435 - UVM.76MM.X1 - Universal Valved Muffler Kit - Single Inlet / Single Outlet - 3.0" (76mm) - 1 Muffler - Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button - Valvetronic Designs - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:
Valvetronic Designs - Corporate Logo
ES#:
5457435
Mfg#:
UVM.76MM.X1
Ships in 1 Business Day
ON SALE! SAVE 10%
$399.99

This product was last offered at the strikethrough price on
08-25-2026

$359.99 USD
Free Shipping

Cat-Back Exhaust System - ValveSonic

2.37" stainless steel with quad 80mm black Cerakote tips Fits both manual and automatic transmission models

Brand:
Milltek Sport - Corporate Logo
ES#:
2827521
Mfg#:
SSXAU404
Ships in 5 Business Days
ON SALE! SAVE 10%
$3679.00

This product was last offered at the strikethrough price on
08-29-2026

$3311.10 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Hobbs Switch (30 psi)

Engages water-methanol system at 35PSI Adjustable from 25-50psi

Brand:
SnowPerformance - Corporate Logo
ES#:
2826280
Mfg#:
81081
In Stock at Vendor
$74.99 USD
Free Shipping
on orders $49 and up

Universal Valved Muffler Kit - Single Inlet / Single Outlet - 2.5" (63mm) - 1 Muffler

ES#4686062 - UVM.63MM.x1 - Universal Valved Muffler Kit - Single Inlet / Single Outlet - 2.5" (63mm) - 1 Muffler - Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button - Valvetronic Designs - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:
Valvetronic Designs - Corporate Logo
ES#:
4686062
Mfg#:
UVM.63MM.X1
Ships in 5 Business Days
ON SALE! SAVE 10%
$399.99

This product was last offered at the strikethrough price on
08-25-2026

$359.99 USD
Free Shipping
on orders $49 and up

Union Tee - 1/4 Quick Connect

Quick connect union T-fitting for 1/4" Nylon

Brand:
SnowPerformance - Corporate Logo
ES#:
2826282
Mfg#:
82040
Special Order: No Guaranteed ETA
$23.99 USD
Free Shipping
on orders $49 and up

FP34 Fuel Pump Surge Tank

ES#4877045 - 034-106-A002/3 - FP34 Fuel Pump Surge Tank - Designed for Bosch 044 Fuel Pump - 034Motorsport - Audi Volkswagen

Designed for Bosch 044 Fuel Pump 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4877045
Mfg#:
034-106-A002/3
Back Ordered
$351.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B8 S4/S5 SAI Breather Bracket & Adapter

ES#4900393 - CTS-HW-113&114 - B8 S4/S5 SAI Breather Bracket & Adapter - Looking to clean up the engine bay of your B8/B8.5 Audi S4 or S5? - CTS - Audi

Looking to clean up the engine bay of your B8/B8.5 Audi S4 or S5?

Brand:
CTS - Corporate Logo
ES#:
4900393
Mfg#:
CTS-HW-113&114
Special Order: No Guaranteed ETA
ON SALE! SAVE 15%
$119.99

This product was last offered at the strikethrough price on
08-26-2026

$101.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System

ES#2614362 - 16598 - Cat-Back Exhaust System - 2.5" stainless steel with quad 3.5" polished stainless tips - Magnaflow - Audi

2.5" stainless steel with quad 3.5" polished stainless tips

Brand:
Magnaflow - Corporate Logo
ES#:
2614362
Mfg#:
16598
Back Ordered
$1930.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Universal T-Style Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler

ES#5457434 - UVM76MMTSTYLEX1 - Universal T-Style Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler - Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button - Valvetronic Designs - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:
Valvetronic Designs - Corporate Logo
ES#:
5457434
Mfg#:
UVM76MMTSTYLEX1
Back Ordered
ON SALE! SAVE 10%
$499.99

This product was last offered at the strikethrough price on
08-25-2026

$449.99 USD
Free Shipping

Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler

ES#5457432 - UVM76MMDUALOUTx1 - Universal Valved Muffler Kit - Single Inlet / Dual Outlet - 3.0" (76mm) - 1 Muffler - Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button - Valvetronic Designs - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Upgrade your ride with the Valvetronic Designs universal valve muffler kit, a premium T304 stainless steel solution that delivers an aggressive, valved exhaust note at the click of a button

Brand:
Valvetronic Designs - Corporate Logo
ES#:
5457432
Mfg#:
UVM76MMDUALOUTX1
Back Ordered
ON SALE! SAVE 10%
$399.99

This product was last offered at the strikethrough price on
08-25-2026

$359.99 USD
Free Shipping

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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