MST Performance

Cold Air Intake + Turbo Inlet Kit
for BMW B58 G-Chassis

BW-B5812

Combined Intake System + Turbo Inlet Maximum Airflow G-Chassis B58 Platform

Overview

The MST Performance BW-B5812 is a complete induction upgrade for the BMW B58 G-chassis platform, combining a high-flow cold air intake system with MST’s turbo inlet pipe in one bolt-on kit. Engineered to address the two biggest restrictions in the factory induction path, this kit reduces intake air temperatures and improves turbo response from idle to redline.

Built specifically for G20/G21 M340i, G22/G23 M440i, G42 M240i, and related B58 G-chassis vehicles, the BW-B5812 delivers measurable gains for stock and tuned cars alike. Whether you’re running pure stock, an OTS map, or a custom Stage 2 tune, this kit unlocks airflow potential that the factory plastic intake and restrictive turbo inlet simply cannot match.

Key Features

• Complete cold air intake + turbo inlet pipe combination
• Heat-shielded enclosure isolates intake from engine bay heat
• Larger-diameter turbo inlet eliminates the factory bottleneck
• MST high-flow washable, reusable performance air filter
• Direct bolt-on installation with no permanent modifications
• Compatible with stock, OTS, and custom tunes
• Includes all couplers, clamps, and mounting hardware
• Backed by MST Performance a leader in BMW induction systems

Fitment

• 2019+ BMW G20/G21 M340i / M340i xDrive (B58 3.0L)
• 2021+ BMW G22/G23 M440i / M440i xDrive (B58 3.0L)
• 2022+ BMW G42 M240i xDrive (B58 3.0L)

What’s Included

• MST BW-B5812 Cold Air Intake Pipe Assembly
• MST Turbo Inlet Pipe
• MST High-Flow Performance Air Filter
• Heat shield assembly
• All necessary couplers, clamps, and mounting hardware

Part Information