About the product
Project Gamma downpipes for the BMW M3 and M4 (G80/G82) are available as a complete performance package that includes high-flow downpipes, ECU unlock service, and your preferred tuning platform.
This bundle is designed to deliver increased airflow, stronger performance, and reliable power while offering exceptional value compared with purchasing each service separately.
When paired with proper tuning, Project Gamma downpipes can provide significant horsepower and torque gains, improved turbo response, a more aggressive exhaust sound, and enhanced overall drivability—making this one of the most effective performance upgrades for the G80/G82 platform.
Project Gamma G80/G82 Downpipes
Engineered specifically for the BMW M3 and M4 (G80/G82), Project Gamma downpipes feature a 3.5-inch high-flow design with precision CNC-machined stainless-steel connections for proper fitment and unrestricted exhaust flow.
Unlike many competing downpipes that reduce in diameter near the turbo outlets, our downpipes maintain a true full-diameter design through the final sections. With proper tuning, gains of up to 50 horsepower and 60 lb-ft of torque may be achieved.
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Full 3.5-inch diameter
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Handcrafted from 304 stainless steel
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Precision CNC-machined connections
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Excellent heat and corrosion resistance
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Improved turbo response and exhaust flow
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Designed for tuned and high-performance applications
ECU Unlock and Tuning
This package includes the ECU unlock service required to flash compatible aftermarket tuning software on locked G80/G82 ECUs.
Customers must contact Project Gamma before bringing in or shipping their ECU to receive instructions and confirm compatibility.
After the ECU is unlocked, customers may select their preferred tuning platform:
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Bootmod3
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MHD
Both tuning options allow the vehicle to be properly calibrated for the high-flow downpipes and optimized for improved power delivery and drivability.
Important Notes
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Contact Project Gamma before bringing in or shipping your ECU.
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ECU unlock compatibility must be confirmed before service.
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Proper tuning is required for maximum performance.
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Professional installation is strongly recommended.
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Performance gains may vary depending on fuel quality, vehicle condition, modifications, and tune selection.
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High-flow or catless downpipes may trigger a check engine light without proper tuning.
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Please verify local emissions and motorsport regulations before purchasing.
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.com and 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.