VCTR Performance Audi S4/S5 B9 Catless Downpipe Kit

Overview

The B9 S4/S5 EA839 3.0T factory downpipe carries an OPF filter that is the primary restriction in the post-turbo exhaust path. Removing it with this catless downpipe opens the exhaust circuit — improving turbo spool, exhaust flow and providing the foundation for meaningful power gains on tuned EA839 applications.

Why Upgrade?

• Removes the primary restriction in the factory post-turbo exhaust path
• Improved turbo spool — the turbo recovers and builds pressure faster
• More defined exhaust tone under load
• Stainless steel construction for longevity
• Provides the foundation for meaningful power gains on a tuned map

Engineering Focus

Fabricated from SS304 stainless steel with OPF delete section. Matched to the OEM downpipe flanges for direct replacement. No fabrication required.

Built for the Drive, Not Just the Dyno

A catless downpipe is the clearest sign a build has moved past stock thinking — every gram of OPF restriction gone from the EA839's V6 at once. It's a road-and-track piece for builds that have already committed to a tune, not a daily-comfort one.

Fitment

Compatible with:

• Audi S4 B9 3.0T EA839 (pre-2019 — no OPF)
• Audi S5 B9 3.0T EA839 (pre-2019 — no OPF)

Catless unit — for off-road and motorsport use. Tuning is strongly recommended post-installation.

What's Included

• Catless downpipe assembly
• Supplied gaskets and installation hardware

Specifications

• Material: SS304 Stainless Steel
• Catalyst: None (catless)
• Engine: EA839 3.0T (pre-OPF)
• Fitment: OEM flange replacement

Shipping & Fit

• Confirmed fitment by chassis and engine code before you buy, not after
• Worldwide shipping, cost calculated at checkout for your destination
• Australian Consumer Law returns on all unused, unfitted parts
• Questions about your specific build? Message us — real people, real platform knowledge

Delivery & Support

Your order is carefully inspected before dispatch and backed by VCTR Performance support. For product availability, shipping estimates or fitment assistance, contact our team.