Originally Posted by
Bob_B
They are intended to optimize the inlet area for the DS98 which requires a slight enlarging of the inlet openings of about 2-3mm on three sides.
They were never intended for the turbine powered Joker, but some have installed them and they probably clean up the air in front of the turbine.
I can’t see any down side. The inspiration jet the joker is based off is fully ducted, and it always niggled me that when I look into the intake I can see a fues former right in the airflow, be nice to smooth it off a little. Not worth it, if they cost a fortune. But I’d be interested in fitting them definitely.