ABOUT THE PRODUCT
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:
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Precision CNC-Machined V-Band & Flanges for a secure, leak-free fitment.
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High-Flow Catless Design optimized for turbo efficiency and reduced backpressure (tune required).
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Premium 304 Stainless Steel Construction for corrosion resistance and long-term durability under high temperatures.
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Enhanced Turbo Response & Reduced Lag through optimized exhaust flow.
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Exotic, Aggressive Exhaust Tone that complements performance-oriented driving.
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Handcrafted & TIG-Welded for precision and strength.
Perfect For:
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Enthusiasts looking to unlock more power and throttle response on tuned BMW M5 G90 / G99 platforms.
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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)
When will my order ship?
If it’s in stock and the order is placed before 3pm, it ships the same day. If you ordered a product with ceramic coating, it will ship the following business day.
If the product or color spec you’re looking for is not in stock, you can join the waitlist by clicking the “email when available” button underneath the “out of stock” label. We will email you as soon as your product is available and give you an estimated back in stock time.
What if I submitted a custom order?
If you are making a custom order, email us to submit your request and we will give you an estimated delivery time based on the special manufacturing time.
What if my product arrives damaged, incorrect, or is missing parts?
If you received the incorrect product or color, missing parts, or the item is defective, email us a picture with your order number and you will receive a refund or exchange. Contact us at info@shopprojectgamma.comand we will work with you to make it right.
What if I’m not satisfied with the product?
If the product is unused and uninstalled, we can offer you a refund, exchange, or store credit. If the product was used or installed on your vehicle, we unfortunately cannot offer any refund, exchanges, or credit.
What if I installed my products and then I decide I don’t like them?
Unfortunately used or installed products will not qualify for a return or refund. If you have any questions or concerns you can email us at info@shopprojectgamma.com
A restocking fee of 20% of the original purchase price may be applied to returned products. This fee covers the costs associated with processing the return and restocking the item if applicable. Please refer to our policies page for more info regarding all exchanges and returns.
Have a question you don't see answered here? Email us at info@shopprojectgamma.com and we'll get back to you.
