The L-164 was developed from the Bushcaddy L-162 as a true four seat aircraft. Unlike the L-160's designation, which indicates that the design engine for that model was originally a Lycoming O-320 of 160 hp (119 kW), the L-164 designation is just a numerical sequence and does not indicate horsepower.
The L-164 features a strut-braced high-wing, a four seat enclosed cockpit, fixed conventional landing gear, or optionally tricycle landing gear, and a single engine in tractor configuration. Floats and skis can also be fitted.
The aircraft fuselage is made with a frame of welded 6061-T6 aluminum square tubing, covered in 6061-T6 sheet. Its 36 ft (11.0 m) span wing employs V-struts with jury struts. The wing has an area of 189 sq ft (17.6 m2) and flaps. It can accept four-stroke powerplants from 180 to 250 hp (134 to 186 kW), with the Lycoming O-360 of 180 hp (134 kW) and a Franklin Engine Company powerplant of 220 hp (164 kW) commonly used. Cabin access is via two fold-up doors.
Construction time for the factory kit is estimated at 1200 hours or 300 hours from the quick-build kit. Four examples had been completed and flown by December 2011.
Capacity: three passengers
Length: 25 ft 6 in (7.77 m)
Wingspan: 36 ft 0 in (10.97 m)
Wing area: 189 sq ft (17.6 m2)
Airfoil: NACA 4413 (mod)
Empty weight: 1,350 lb (612 kg)
Gross weight: 2,500 lb (1,134 kg)
Fuel capacity: 60 U.S. gallons (230 L; 50 imp gal)
Powerplant: 1 × Lycoming I0-360-L2A four cylinder, fuel-injected, air-cooled, four stroke aircraft engine, 160 hp (120 kW)
Propellers: 2-bladed Sensenich 76EM8, 6 ft 4 in (1.93 m) diameter
Maximum speed: 129 mph (208 km/h; 112 kn)
Cruise speed: 115 mph (100 kn; 185 km/h) at 75% power
Stall speed: 38 mph (33 kn; 61 km/h) flaps down
Range: 750 mi (652 nmi; 1,207 km)
G limits: +5.3/-3.2 (+3.8/-1.9 normal category)
Rate of climb: 1,200 ft/min (6.1 m/s)
Wing loading: 13.22 lb/sq ft (64.5 kg/m2)