A

Adam
Aero Commander – Rockwell / Twin Commander / Gulfstream
AeroMods (TIO-540)
Aeronca - Bellanca / American Champion

Aerostar - TW Smith / Piper
Ag-Cat - Schweizer
Aircoupe - Erco

Airflow Systems (Intercooler)
Air Plains (Engine STC)
Alarus
Alexandria - Bellanca
Alon – Erco / Forney / Mooney
American Champion – Champion / Bellanca / Aeronca
American Yankee – Grumman / Gulfstream

Angel Aircraft
Atlantic Aero (550 TI)
Aviat

B

Beagle - South Florida Aircraft
Beech – Raytheon / Hawker-Beech
Bell
Bellanca
Boeing - Stearman
Brantly
Britten Norman
Bush Conversions (Engine STC)

C-G

Callair - Intermountain / Aero Commander / RAMSA / APDC / Rockwell / AAMSA
Cessna
Champion – Aeronca / Bellanca

Cirrus
Columbia - Cessna
de Havilland - Viking

Diamond Aircraft
Found -Expedition
Glasair
Great Lakes
Grob
Grumman American – American Yankee / Gulfstream / Ag Cat

H-L

Helio - Alliance Aircraft LLC
Hiller
Hughes - Schweizer
Interstate
Lake – Consolidated Aeronautics / Revo
Legend Cub
Luscombe

M-R

Maule
Micco
Mod Works (Engine STC)
Mooney
Navion – Ryan / Rangemaster
North American - Rockwell
Pacific Aerospace
Parks Industries
Partenavia - Vulcanair

Penn Yan Aero
Piper
PZL - Cadmus

Questair (Experimental)
Raytheon - Beech
Robinson
Rockwell - Gulfstream / Twin Commander

S-Z

Schweizer
Slingsby
Socata – Aerospatiale
Stearman – Boeing
Stinson - Univar
Swift – Globe
Taylorcraft
Tiger – American General / Grumman / Gulfstream

Turbo Plus - Allied Eagles
Valmet
Varga - Morrisey / Shinn
Vulcanair - Partenavia

Zenair
Zlin