Exhaust fumes in the cockpit, Griff 400

[kolling]

Hello guys!
Does anyone have emission data for the HC out the back for the pre-cat Griff 500 system sold by ACT?
I need to install a system removing HC to well below 70 ppm to solve the rumbling from the passenger seat! And to be honest - also to get to my destination smelling from fresh air instead of exhaust fumes..........

[Scrump]

Have you seen this thread?
https://www.pistonheads.com/gassing/topic.asp?h=0&...

Doesn’t answer your question but it may help.

[kolling]

Worth looking at. Thanks:-)