Stages of the B58 Gen I

Whether you’re looking for a modest performance bump or aiming to build a full-blown track monster, understanding the stages of the B58 Gen 1 platform is key to reaching your goals. At Texas M Powerhouse, we’ve broken down the upgrade path into clear, progressive stages—each designed to maximize performance, reliability, and drivability.

  1. ECU Tuning Only: Entry-level performance boost.

    A simple software upgrade that increases horsepower and torque without any hardware changes. Great for daily driving with improved throttle response and smoother power delivery.

  2. Bolt-On Power: Better airflow and cooling.

    Adds basic performance parts like intake, downpipe, and charge pipes, along with an upgraded front-mount intercooler. Ideal for reducing heat soak and enhancing turbo efficiency.

  3. Full Bolt-On + Fueling: Unlocks max power on the stock turbo.

    Incorporates full bolt-ons plus upgraded fueling like HPFP or port injection. Supports ethanol blends (E30–E50) for cooler combustion and more power. The limit of the stock turbo setup.

  4. Turbo Upgrade Package: Big power potential.

    Replaces the stock turbo with a hybrid or full-frame option. Requires fueling and cooling upgrades to handle high boost. Perfect for street or race builds looking for 600+ WHP.

  5. Built Motor & Race Setup: Engineered for extreme builds.

    Forged internals, upgraded drivetrain, and heavy-duty components to safely handle 700–800+ WHP. Designed for drag racing, roll racing, or track use with high-boost reliability.

    • Simple ECU flash tuning

    • Gains of 50–80+ HP depending on fuel

    • No hardware required

    • Improved throttle response and drivability

    • Upgraded intake, downpipe, and charge pipes

    • Front mount intercooler (FMIC) recommended

    • Better airflow, lower IATs

    • Tune adjusted to support hardware

    • Gains: ~80–120+ HP over stock

    • Adds upgraded high-pressure fuel pump (HPFP) or port injection

    • Supports ethanol blends (E30–E50)

    • Turbo at its safe limit

    • Peak reliable power on stock turbo

    • Gains: ~120–160+ HP

    • Hybrid or full-frame turbo upgrade

    • Supporting mods: intake, downpipe, fueling upgrades, FMIC

    • High boost capability with custom tuning

    • Requires port injection or methanol

    • Gains: ~500–650+ WHP potential

    • Forged pistons/rods, performance bearings, head studs

    • Engine built to withstand high boost (30+ PSI)

    • Transmission upgrades advised

    • Full race-ready power: 700–800+ WHP possible

  • BMW 3 Series

    • G20 340i / 340i xDrive (2019–2020; early models before Gen 2 switch)

    BMW 4 Series

    • F32/F33/F36 440i / 440i xDrive (2016–2020)

    BMW 5 Series

    • G30 540i / 540i xDrive (2017–2020)

    BMW 6 Series GT

    • G32 640i / 640i xDrive (2017–2020)

    BMW 7 Series

    • G11/G12 740i / 740i xDrive (2016–2019)

    BMW X Models

    • G01 X3 M40i (2018–2019)

    • G02 X4 M40i (2019)

    BMW Z Series

    • G29 Z4 M40i (2019; U.S. spec = Gen 1, EU spec = Gen 2 due to OPF regulations)

    Toyota Supra (A90)

    • 2020 Toyota GR Supra (U.S. spec) – shared Gen 1 B58

Stages of the B58 Gen II

The B58 Gen 2 platform is one of BMW’s most capable and tunable engines, offering impressive gains even with minimal upgrades. At Texas M Powerhouse, we’ve mapped out a clear path of performance stages to help you build the perfect street or track machine. From a basic ECU tune to a fully built, 1000+ horsepower setup, each stage is engineered to deliver reliable power, smooth drivability, and future-ready performance.

  1. ECU Tuning Only: Clean and simple power boost.

    An ECU reflash gives significant gains thanks to Gen 2’s improved factory turbo and fueling. Delivers sharper throttle, better response, and optional flex-fuel tuning — no hardware needed.

  2. Bolt-On Power: Improves airflow and cooling efficiency.

    Adds intake, downpipe, and charge pipe upgrades, along with a high-performance heat exchanger. Unlocks more consistent performance under load and heat.

  3. Full Bolt-On + Fueling: Maxes out the stock turbo with ethanol.

    Combines all bolt-ons with upgraded HPFP or port injection to support ethanol blends (E30–E85). Flex-fuel tuning lets you run multiple fuels with big horsepower gains.

  4. Turbo Upgrade Package: Big turbo, bigger gains.

    Upgrades to hybrid or full-frame turbo for major boost and top-end power. Requires upgraded fueling and cooling. More efficient turbo design on Gen 2 means faster spool and more reliable power delivery.

  5. Built Motor & Race Setup: For those chasing 1000+ HP.

    Includes forged internals, performance valvetrain, and full drivetrain support. Designed to handle extreme power and high boost levels for drag, roll-race, or competitive track use.

    • More efficient stock turbo tuning

    • Gains of 60–100+ HP depending on octane

    • No hardware needed

    • Optional flex-fuel support (with tune)

    • Intake, downpipe, and charge pipes

    • Upgraded heat exchanger instead of FMIC

    • Efficient cooling and boost handling

    • Flex-fuel tuning becomes available

    • Gains: ~100–140+ HP with tune and bolt-ons

    • Flex-fuel compatible (E30–E85 blends)

    • HPFP more capable than Gen 1 but still benefits from upgrades

    • Optional port injection for stability at high boost

    • Gains: ~130–180+ HP with ethanol & full bolt-ons

    • Same as Gen 1 with improved turbo efficiency

    • Better spool and reliability at high boost

    • More efficient fuel delivery system

    • Easier to hit 600–700+ WHP with supporting mods

    • Cooling upgrades highly recommended

    • Similar internals build, often stronger from factory

    • Supports up to 1000+ HP with proper turbo/fueling

    • Higher fuel flow and better ECU response

    • Full drivetrain upgrades essential for reliability

    • Designed for serious racing and roll-race builds

< S63 Stages
N54 Stages >

  • BMW 2 Series

    • G42 M240i / M240i xDrive (2022–present)

    BMW 3 Series

    • G20 340i / 340i xDrive (2020 facelift onward)

    BMW 4 Series

    • G22/G23/G26 440i / 440i xDrive (2021–present)

    BMW 5 Series

    • G30 540i / 540i xDrive LCI (Facelift) (2020–present)

    BMW 6 Series GT

    • G32 640i / 640i xDrive LCI (2021–present)

    BMW 7 Series

    • G11/G12 740i / 740i xDrive LCI (2020–2022)

    BMW X Models

    • G01 X3 M40i (2020–present, post-facelift)

    • G02 X4 M40i (2020–present, post-facelift)

    • G05 X5 xDrive40i (2019–present)

    • G06 X6 xDrive40i (2020–present)

    • G07 X7 xDrive40i (2019–present)

    BMW Z Series

    • G29 Z4 M40i (2020 EU-spec onward)

    Toyota Supra (A90/A91)

    • 2021+ Toyota GR Supra 3.0 (Global) – upgraded to B58 Gen 2

Contact us.

info@TexasMPowerhouse.com
(945) 344-0072

15898 SH-205
Unit 5
Terrell, TX 75160