Project Gamma High-Flow Downpipes for BMW M5 G90 & G99 (S68 Twin-Turbo V8) – 304 Stainless Steel, CNC Precision

Upgrade your BMW M5 G90 Sedan and G99 Touring with Project Gamma’s high-flow catless downpipes, engineered for maximum turbo efficiency, power, and response. Crafted from premium 304 stainless steel with precision CNC-machined V-band transitions, these downpipes are built to withstand demanding performance driving and deliver measurable gains when properly tuned.

Unlike many competitors that neck down piping closer to the turbo outlet, our design maintains a smooth 3D-bent flow path all the way through, unlocking improved exhaust velocity and reduced backpressure for stronger spool and throttle response. When paired with a proper ECU tune, this upgrade can deliver significant horsepower and torque increases compared to stock exhaust manifolds.

Key Features & Benefits:

• Precision CNC-Machined V-Band & Flanges for a secure, leak-free fitment.

• High-Flow Catless Design optimized for turbo efficiency and reduced backpressure (tune required). 

• Premium 304 Stainless Steel Construction for corrosion resistance and long-term durability under high temperatures.

• Enhanced Turbo Response & Reduced Lag through optimized exhaust flow. 

• Exotic, Aggressive Exhaust Tone that complements performance-oriented driving. 

• Handcrafted & TIG-Welded for precision and strength. 

Perfect For:

• Enthusiasts looking to unlock more power and throttle response on tuned BMW M5 G90 / G99 platforms.

• Track-oriented builds and performance upgrades where full exhaust flow is critical. 

Fitment:
✔ BMW M5 G90 Sedan (S68 Twin-Turbo V8)
✔ BMW M5 G99 Touring (S68 Twin-Turbo V8)