Designed for the 3.0ltr V6 Audi S4 2018+ chassis.   
 
Theres an underestimated amount of room for a big turbo in the Audi B9 S4.   Where the OE catalytic makes its home can also be a comfy spot for a big turbo.  With this design we have shown room for the G35-1050 and G40-1150 turbo.   Other medium frame and TH4V models can be accomodated. 
 
This design keeps much less turbine heat energy away from the OE oil cooler. 
 
To make best use of the space - the manifold utilizes a metal 3D printed rear half for the turbo elbow and 44mm wastegate branch.  The front end uses .080" thick 321ss tube.   
 
The system can be easily supported for long term use with a solid bracket off the 2 top transmission bolts to the turbo.