VCTR Performance Audi S4/S5 B9 Catted Downpipe Kit
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.
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.
The OPF on the B9's EA839 V6 is a noise- and emissions-compliance part first, an exhaust component second. This kit removes that restriction while keeping a real catalyst in place, so the car stays road-legal and gains the turbo response the EA839 has been holding back the whole time.
Compatible with:
Tuning is recommended to fully benefit from the improved exhaust path.
Your order is carefully inspected before dispatch and backed by VCTR Performance support. For product availability, shipping estimates or fitment assistance, contact our team.
Made with care and unconditionally loved by our customers, this signature bestseller exceeds all expectations.
Made with care and unconditionally loved by our customers, this signature bestseller exceeds all expectations.
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