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.

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

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.