ABOUT THE PRODUCT
Project Gamma High-Flow Catless Downpipes for BMW S68 M5 G90 / G99 and 7 Series G70 / G73
Upgrade your BMW S68 twin-turbo V8 platform with Project Gamma high-flow catless downpipes, engineered for improved exhaust flow, reduced backpressure, faster turbo response, and increased performance.
Constructed from premium 304 stainless steel, these downpipes are built for long-term durability, corrosion resistance, and high-temperature performance. Each set features precision CNC-machined V-band connections and flanges for secure fitment, proper sealing, and reliable installation.
Unlike many restrictive factory-style designs, Project Gamma downpipes are designed with a smooth 3D-bent flow path to help maintain strong exhaust velocity from the turbo outlet through the exhaust system. This helps improve turbo efficiency, sharpen throttle response, reduce lag, and support increased horsepower and torque when paired with the proper ECU tune.
Compatible Fitment:
- BMW M5 G90 Sedan — S68 Twin-Turbo V8
- BMW M5 G99 Touring — S68 Twin-Turbo V8
- BMW 7 Series G70 — 07/2021 to 03/2025
- BMW 7 Series G73 — 11/2021 to 02/2025
Key Features:
- High-flow catless design for maximum exhaust flow
- Premium 304 stainless steel construction
- Precision CNC-machined V-band connections and flanges
- TIG-welded for strength and durability
- Smooth 3D-bent piping for improved exhaust velocity
- Reduced backpressure compared to factory downpipes
- Improved turbo spool and throttle response
- Aggressive performance exhaust tone
- Designed for tuned S68 twin-turbo V8 applications
Important Notes:
ECU tuning is required for proper performance and to help prevent check engine light issues. These are high-flow catless downpipes intended for off-road or track use only where permitted by law.
For questions, photos, videos, or fitment support, please email us at info@shopprojectgamma.com or message us on Instagram @project_gamma.
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.