Exhaust› Catalytic Converters

034Motorsport

Downpipe, B9 S4

$1,210.00

SKU: 0001 034-105-4045

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The 034Motorsport Stainless Steel Racing Catalyst for B9/B9.5 Audi S4/S5 is a drop-in replacement for the factory catalytic converter. It increases horsepower and torque, reduces turbocharger lag, improves throttle response, and enhances the exhaust note. The catalyst features a 148mm diameter Euro4 racing catalytic converter, integrated v-band flange, oxygen sensor bung, and 3-bolt downpipe flanges. It is constructed from 304 stainless steel, TIG-welded, and includes an OE style heat isolation barrier.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

Brand034Motorsport
Part Number0001 034-105-4045

Videos

Installing DOWNPIPE on my B9 Audi S4! *LOUDER & FASTER*

Installing DOWNPIPE on my B9 Audi S4! *LOUDER & FASTER*
034Motorsport B9 S4/S5 High Flow Catted Downpipe

034Motorsport B9 S4/S5 High Flow Catted Downpipe
Installing 034Motorsport Downpipe | Pops & Bangs | Audi S4 B9

Installing 034Motorsport Downpipe | Pops & Bangs | Audi S4 B9
Audi S4 Downpipe Exhaust & Stage 2 ECU/TCU (Aggressive Sound)

Audi S4 Downpipe Exhaust & Stage 2 ECU/TCU (Aggressive Sound)
Does a Catless Downpipe Make More Power Than a Catted Downpipe? Audi B9 S4

Does a Catless Downpipe Make More Power Than a Catted Downpipe? Audi B9 S4
034 Motorsport Tuned B9 S4! (Launch Control, Walk Around, ETC)

034 Motorsport Tuned B9 S4! (Launch Control, Walk Around, ETC)

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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