Overview
The B58 factory downpipe includes a small pre-catalyst that limits post-turbo exhaust flow. This high-flow catted downpipe replaces it with a less restrictive unit — improving turbo spool and supporting tuned B58 power targets across F-series and early G-series applications.
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 high-flow catalyst. Wide B58 platform fitment across multiple F and G-series chassis from 2017 onwards.
Built for the Drive, Not Just the Dyno
The factory B58 downpipe is sized to pass certification, not to flow freely — it's the first real restriction the exhaust gases meet after the turbo. This kit clears it without giving up the catalyst, so the car stays road-legal and gains the turbo response the B58 has been holding back across a wide range of platforms.
Fitment
Compatible with:
- BMW M140i F20 / F21 (2012–2019) — 3.0L N55 Single Turbo
- BMW M140i F20 / F21 (2016–2019) — 3.0L B58 Single Turbo
- BMW M240i F22 / F23 (2016–2021) — 3.0L B58 Single Turbo
- BMW 340i F30 / F31 (2016–2019) — 3.0L B58 Single Turbo
- BMW 440i F32 / F33 / F36 (2016–2019) — 3.0L B58 Single Turbo
- BMW 540i G30 (2017+) — 3.0L B58 Single Turbo
- BMW 740i G11 / G12 (2016+) — 3.0L B58 Single Turbo
- BMW M340i G20 / G21 (2019+) — 3.0L B58 Single Turbo
- BMW M440i G22 / G23 (2021+) — 3.0L B58 Single Turbo
- BMW M240i G42 (2022+) — 3.0L B58 Single Turbo
- BMW Z4 M40i G29 (2019+) — 3.0L B58 Single Turbo
- Toyota GR Supra A90 / A91 (2019+) — 3.0L B58 Single Turbo
Note: verify your specific model, year, engine code and build variant before ordering, or message us your rego/VIN and we'll confirm it for you.
What's Included
- High-flow catted downpipe assembly
- Supplied gaskets and installation hardware
Specifications
- Material: SS304 Stainless Steel
- Catalyst: High-flow
- Engine: B58 3.0T
- 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.