Audi B9 S4 Quattro 3.0T
ECS evolutionary design and manufacturing, blending with raw emotion, desire and passion, creating a truly unique driving experience
10X Entries Into Our F80 M3 Sweepstakes
CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3.0T Potential!
Lifetime Replacement
Features TIG welded brushed T304 stainless steel construction and offers gains of 10 AWHP and 12 AWFT-LBS of torque
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MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
04-22-2026
Unleash a throaty growl under hard acceleration!
2X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
08-17-2026
Lifetime Replacement
No cutting required, easy-to-install downpipes with resonator deletes for your factory cat back exhaust.
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
06-13-2026
Lifetime Replacement
Features a TIG-welded 304 stainless and investment cast body and offers gains up to 45HP & 41TQ
Lifetime Replacement
Delivers a truly aggressive exhaust note without any annoying drone or rasp
Lifetime Replacement
Sound great and save weight! Eliminate the center resonator on your OE system for a more aggressive exhaust note
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
06-13-2026
Lifetime Replacement
Unleash the sound your 3.0T was meant to have!
Lifetime Replacement
Equipped with the same precision-engineering as its Touring Edition counterpart, minus the resonators up front and 180 Technology® resonators in the rear.
2X Entries Into Our F80 M3 Sweepstakes
Keep your underhood temps low and your turbo speeds high!
Lifetime Replacement
Aggressive sound, quality finish, reliable operation, straightforward install, and affordable fun.
Lifetime Replacement
Offers increased horsepower and torque throughout the powerband, reduced turbocharger lag, improved throttle response, and an enhanced exhaust note
2X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
03-08-2026
Lifetime Replacement
Check-Engine Light free! An emissions-friendly approach to exhaust upgrades!
Lifetime Replacement
Featuring HJS Tuning 200cpsi ECE-approved sports cat - Fits with OE and Milltek cat-back systems.
This product was last offered at the strikethrough price on
08-17-2026
Lifetime Replacement
Change out your ECS Tuning B8/8.5 S4/S5 or B9 A4/S4 Valved Exhaust from resonated to non-resonated!
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
06-13-2026
Lifetime Replacement
