Description
Unleash the true character of your 2025+ BMW G90 M5 with the Signature Catback Exhaust System, meticulously engineered to deliver maximum performance, refined acoustics, and premium craftsmanship. Designed specifically for the S68 4.4L twin-turbo V8 hybrid engine, this system transforms your M5’s driving experience with an aggressive yet controlled exhaust note, improved exhaust flow, and factory-fit precision.
Precision Engineering Meets Motorsport Acoustics
Crafted from T304 mandrel-bent stainless steel, the system provides exceptional durability, corrosion resistance, and heat management under extreme conditions. TIG-welded seams ensure long-lasting integrity and leak-free performance, even during demanding track sessions.
Valved Sound Control – Quiet or Aggressive on Demand
Unlike the OEM system, which omits exhaust valve control, this upgrade includes a remote-operated electronic valve system. Switch effortlessly between a refined, subdued tone for daily comfort and a raw, motorsport-inspired growl for spirited driving—all without the need for additional tuning or coding.
Performance-Driven Flow Design
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3.5” (89mm) Oversized Tubing: Maximizes airflow, minimizes backpressure, and enhances turbo efficiency across the RPM range.
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High-Flow X-Pipe Midsection: Balances exhaust pulses for smoother flow, reduced drone, and a deep, resonant V8 tone.
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Proven Power Gains: With optional catted downpipes, drivers can expect +18–22 horsepower and +20–25 lb-ft of torque, along with sharper throttle response.
Optional High-Flow Catted Downpipes
Upgrade to 400-cell GESI high-flow catalytic converters for enhanced turbo spool, reduced restriction, and retained emissions compliance (region-dependent). CNC-machined flanges and integrated heat shielding ensure OEM-level fit and thermal management.
Refined Sound Tuning
From cold start to wide-open throttle, this exhaust has been acoustically engineered to produce a deep idle rumble, crisp acceleration note, and race-bred roar—all while eliminating unwanted cabin drone, making it perfect for both highway cruising and track use.
Quad 112mm Premium Exhaust Tips
Enhance your M5’s rear profile with quad 112mm dual-wall tips available in brushed stainless steel, matte black, or carbon fiber finishes. The tips are designed to resist heat discoloration while adding an aggressive, upscale aesthetic.
Easy, Reversible Installation
Designed as a direct bolt-on system, this catback requires no cutting, welding, or permanent modifications. All gaskets, clamps, valve motors, remotes, and brackets are included for a seamless installation. Fully reversible for resale or lease return.
Specifications
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Material: T304 Stainless Steel
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Tubing Diameter: 3.5” (89mm)
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Valves: Electronic remote-control plug-and-play system
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Weight Savings: ~10–12 lbs vs. OEM exhaust
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Exhaust Tips: 112mm quad outlets (multiple finishes)
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Fitment: BMW G90 M5 Sedan (2025+) / BMW G99 M5 Touring
Why Choose the Signature Catback for Your G90 M5?
This exhaust system strikes the perfect balance between luxury refinement and motorsport aggression, offering measurable performance improvements and a sound profile that elevates every drive. Engineered for enthusiasts who demand OEM-level precision with aftermarket exhilaration, it’s the ultimate upgrade for your G90 M5.
Unlock the sound, power, and soul of your S68 V8.
