Take Your B58 to the Extreme
Stage 4 is the ultimate expression of what your B58 is capable of. Designed for serious performance enthusiasts, this package transforms your B58 into a high-horsepower build capable of 700–800+hp, while maintaining factory drivability when needed.
This is not a generic bolt-on solution - it’s a fully bespoke performance package, developed and built around your goals, fuel type, and use case (street, track, drag, or all-rounder).
What’s Included:
(Custom-built to your spec – exact parts and brands tailored per build)
Turbo System
Upgraded hybrid turbo or full-frame turbo conversion
Custom turbo manifold (if applicable)
Turbo smart wastegate / boost controller
Heat shielding and supporting hardware
Fueling & Airflow
Upgraded high-pressure fuel pump (HPFP)
Optional port injection or methanol kit
Larger intake system (e.g. MST / Eventuri)
High-flow inlet pipework
Exhaust & Cooling
Full 3.5–4″ turbo-back exhaust system (with or without sports cat)
Large front-mount intercooler or upgraded charge cooler
Oil cooler upgrades (where required)
Software & Electronics
Custom ECU calibration (BM3, MHD, or standalone ECU)
Optional TCU gearbox tune for ZF8
Dyno testing and logging
Map switching options (E85, 98RON, etc.)
Optional Internal Engine Work
Forged pistons & rods
ARP head studs
Closed-deck conversion
Upgraded head gasket & bearings
Power Output:
Estimated Power: 700–800+hp
Estimated Torque: 700–850+Nm
Final output depends on fuel type, turbo selection, and supporting mods.
Built for Reliability
Every Stage 4 build is engineered for longevity, reliability and repeatable performance. That includes careful calibration, premium components, and full support from our experienced technicians.
We don’t just chase dyno numbers - we deliver real-world performance that lasts.
Price on Request:
Due to the bespoke nature of Stage 4 builds, pricing varies depending on your chosen components, goals, and vehicle condition.
To get started, contact us for a personalised quote and consultation.
We’ll walk you through turbo options, fuelling requirements, driveline upgrades, and more - and help you spec the ultimate B58 build.