Overview
The B9 S4/S5's factory downpipe carries an OPF that is the primary restriction in the post-turbo exhaust path. This high-flow catted downpipe replaces the OPF with a less restrictive catalyst — improving exhaust flow and turbo response while maintaining catalytic function for road use.
Why Upgrade?
- High-flow catalyst significantly less restrictive than the factory pre-cat or OPF
- Improved exhaust flow and turbo response versus the OEM downpipe
- Retains catalytic converter — better suited to road-registered vehicles
- Stainless steel construction for durability
- More defined exhaust tone on tuned applications
Engineering Focus
SS304 stainless steel with a high-flow catalyst. The OPF is replaced by a less restrictive unit — an improvement over the factory downpipe that retains catalytic function.
Fitment
Compatible with:
- Audi S4 B9 3.0T EA839 (2019+)
- Audi S5 B9 3.0T EA839 (2019+)
Tuning is recommended to fully benefit from the improved exhaust path.
What's Included
- High-flow catted downpipe assembly
- Supplied gaskets and installation hardware
Specifications
- Material: SS304 Stainless Steel
- Catalyst: High-flow OPF replacement
- Engine: EA839 3.0T
- 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.