Long tube headers - Decat variant

These are equal length featuring billet flanges with velocity stacks in the ports towards piping, 3D printed stainless steel collectors.
All full stainless steel, these will mate up to any X-pipe that fits a standard GranTurismo.

These headers are a product of a 2 year collaborative R&D project, fully CAD engineered and produced in Italy for us.
We've focused with this equal-length manifold on maximum torque gains in 2000-5000 rpm range, and these to just that as evidenced by dyno testing. (please note the torque profile change, a gain of 2000 rpm)

We expect in general 30-45nm and 15-25 hp gains on 4.7 engines, tuned we've got a R&D car nearly at 500 hp, and a massive torque increase of 562nm with stock exhaust (no cats)

Please review the detailed topic of the development and testing on SportsMaserati or Maseratilife forum.