Anybody try/use the Fitch Catalyst or Tru Filter?

[1997SCEBFEX]

My brother traded his Expy for a F250SD Diesel and is sending them to me.
Looking for +/- or indifferences.

Thanks

 

[2000eb]

i was kinda curious bout the fitch catalyst but im pretty sure its a gimmick. take notes about fuel milage before after etc. i would love to see real answers

 

[1997SCEBFEX]

Seeing how my aux fuel pump is already providing increased fuel via the additional fuel mgmt unit, kind of skeptical myself. Not that I put my foot into her, but the extra power and immediate response of the blower are second nature after the past 130K miles. On the other hand, if she'll accept anything other than super from the pump and not having to add additives and be able to run 89, or even 87 w/o detonation is what I'm interested in.