Project Gamma Stainless Steel Catless Downpipes 


Made specifically for Mercedes-Benz AMG GT63 / GT63S


Project Gamma catless downpipes for the AMG GT63 / GT63S models feature a 4 to 3” construction along with a stainless steel v-band to pipe transition that is machined with CNC to precision. Our downpipes are the best bang for your buck mod available for your AMG GT63 / GT63S with gains from 50 Horsepower and 60 Torque when tuned. Rather than necking down closer to the turbos like most of our competitors, our downpipes present a full 3D design up to the last inches proving a greater increase in flow. These downpipes allow for cooler temperatures in the engine bay with the addition of heat shielding.  Project Gamma catless downpipes are handcrafted to extreme rust resistance using 304 Stainless Steel.


Ceramic coating is offered to reduce temperature in the engine bay. 



- Major increases in power throughout the powerband

- Improved turbo and throttle response

- Elimination of turbo lag

- Exotic exhaust note

- Precise and proper fitment using factory heat shielding


Note: This product requires installation by a technician and will need tune recalibration to avoid cel light.  


This product fits the following Mercedes-Benz models:

- 2019-2020 Mercedes-Benz  AMG GT 63 4 Door Coupe (M177)

- 2019-2020 Mercedes-Benz  AMG GT 63 S 4 Door Coupe (M177)


Mercedes-Benz AMG GT63 / GT63S Catless Downpipes

$1,399.00 Regular Price
$1,099.00Sale Price
  • Refund policy

    Unfortunately we can’t offer you a refund or exchange. 

    To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. 

    To complete your return, we require a receipt or proof of purchase. 
    Please do not send your purchase back to the manufacturer. 

    There are certain situations where only partial refunds are granted (if applicable)  for any further questions please send us an email at

©2019 by Project Gamma

7171 Harwin Dr. 102, Houston TX 77036

+1 (713) -478-5647