Description

Premium T304 stainless steel valved exhaust system for BMW G01 X3 / G02 X4 M40i B58 3.0T. High-flow cat-back design, dual-mode sound, drone-free cruise, direct bolt-on performance upgrade.

Product Overview

Upgrade your BMW G01 X3 or G02 X4 M40i B58 3.0T with our high-performance stainless steel cat-back exhaust system. The restrictive factory exhaust muffles the iconic inline-six turbo sound and creates excessive backpressure, limiting engine airflow and dynamic performance. Engineered exclusively for the B58 3.0T engine, this T304 stainless steel exhaust features precision mandrel-bent piping to optimize exhaust flow. Built-in electronic valve system delivers dual sound modes, balancing quiet daily commuting and aggressive sport driving. 100% OEM mounting points enable tool-free bolt-on installation without cutting or welding, perfectly compatible with OPF and non-OPF factory models.

Key Features

• Vehicle-Specific Precision Fit: Custom-built for BMW G01 X3 M40i / G02 X4 M40i B58 3.0T. Fully matches original hangers, flanges and sensor positions for seamless direct replacement.
• Premium T304 Stainless Steel: Adopts high-grade anti-rust stainless steel with excellent high-temperature and corrosion resistance. Precise TIG seamless welding ensures leak-free performance and long service life for daily and sport driving.
• Dual-Mode Valved Sound Tuning: Valve closed for smooth, drone-free highway cruising; valve open releases deep, rich B58 inline-six turbo tone. Eliminates annoying cabin resonance for all-scenario usability.
• High-Flow Performance Design: Smooth mandrel-bent tubing reduces airflow turbulence and backpressure, improves turbo spool response and throttle sensitivity, unlocking subtle power and torque gains.
• Complete Reversible Kit: Includes exhaust pipes, muffler assembly, valve actuator, polished tips and full installation hardware. Fully reversible to stock exhaust anytime.

Specification

Compatible Model	BMW G01 X3 M40i / G02 X4 M40i
Engine	B58 3.0T Inline-Six Turbo
Material	304 Stainless Steel
Type	Valved Cat-Back Exhaust System
Installation	Direct Bolt-On, No Modification

FAQ

Q1: Will it trigger check engine light? A: This cat-back exhaust retains factory catalytic converters and OPF modules. Standard installation will not cause CEL fault codes.

Q2: Is it compatible with OPF-equipped models? A: Yes, perfectly fits both OPF and non-OPF B58 G01/G02 M40i models without extra adjustments.

Q3: Can valves sync with factory sport mode? A: It supports wireless remote control and optional wiring to sync with original vehicle drive modes for automatic valve switching.

Q4: Does it produce highway drone? A: Professionally tuned internal resonator eliminates resonant drone, ensuring quiet and comfortable high-speed cruising.

Q5: Is professional installation required? A: Bolt-on design, but professional shop installation is recommended for optimal sealing and fitment