The SRX design is powered by either a 250 hp Crossflow CF4-20THO engine or one 480 hp Pratt & Whitney Canada PT6A-21 turboprop. The twin engine design with floats is the Aerocat TRX, which has two 120 hp Jabiru 3300 engines.
Sources:
Downey, Julia: 2008 Kit Aircraft Directory, Kitplanes, Volume 24, Number 12, December 2007, page 47. Primedia Publications. ISSN 0891-1851
Vandermeullen, Richard: 2011 Kit Aircraft Buyer's Guide, Kitplanes, Volume 28, Number 12, December 2011, page 43. Belvoir Publications. ISSN 0891-1851