;TIO-541-A1A :Six-cylinder, turbocharged, fuel-injected, engine, dry weight ,
AiResearch T-1823 turbosupercharger, certified 23 February 1965. Has top induction, down exhaust and side-mounted accessory drives. Provisions for a single-acting, controllable-pitch propeller and internal piston cooling oil jets. ;TIO-541-E1A4 :Six-cylinder, turbocharged, fuel-injected, engine, dry weight , AiResearch T-1823 turbosupercharger, certified 16 December 1966. Similar to the -A1A but with higher horsepower rating, different cylinder heads, cam shaft, crankshaft and extra counterweights. Incorporates cabin pressurization venturi. ;TIO-541-E1B4 :Six-cylinder, turbocharged, fuel-injected, engine, dry weight , AiResearch T-1823 turbosupercharger, certified 16 December 1966. Similar to the -E1A4 but without the cabin pressurization venturi. ;TIO-541-E1C4 :Six-cylinder, turbocharged, fuel-injected, engine, dry weight , AiResearch T-1879 turbosupercharger, certified 21 October 1969. Similar to the -E1A4 but with a different turbosupercharger with cast bracket, cast transition and a separate wastegate. ;TIO-541-E1D4 :Six-cylinder, turbocharged, fuel-injected, engine, dry weight , AiResearch T-1879 turbosupercharger, certified 21 October 1969. Similar to the -E1B4 but with a different turbosupercharger with cast bracket, cast transition and a separate wastegate. ;TIGO-541-B1A :Six-cylinder, turbocharged, fuel-injected, geared, engine, dry weight , AiResearch T-1879 turbosupercharger, certified 12 February 1970. Similar to the -C1A but with a higher power rating and without provisions for cabin bleed air. ;TIGO-541-C1A :Six-cylinder, turbocharged, fuel-injected, geared, engine, dry weight , AiResearch T-1879 turbosupercharger, certified 19 November 1968. Has internal piston cooling oil jets, side-mounted accessory drives and a single oil supply from the propeller governor. Provisions for a reverse-pitch propeller control. ;TIGO-541-D1A :Six-cylinder, turbocharged, fuel-injected, geared, engine, dry weight , AiResearch T-18A21 turbosupercharger, certified 26 June 1969. Similar to the -C1A but with a higher power rating and a different turbocharger with provisions for cabin bleed air. ;TIGO-541-D1B :Six-cylinder, turbocharged, fuel-injected, geared, engine, dry weight , AiResearch T-18A51 turbosupercharger, certified 3 December 1976. Similar to the -D1A but with an integral wastegate turbocharger and a revised exhaust system and with low drag cylinders. ;TIGO-541-E1A :Six-cylinder, turbocharged, fuel-injected, geared, engine, dry weight , AiResearch T-18A21 turbosupercharger, certified 26 June 1969. Similar to the -D1A but with a lower power rating, different turbocharger spring rate and a variable absolute pressure controller. ;TIGO-541-G1AD :Six-cylinder, turbocharged, fuel-injected, geared, engine, dry weight , AiResearch T-18A21 turbosupercharger, certified 1 May 1975. Similar to the -D1A but it includes an intercooler, a dual magneto and a fuel injector with fuel head enrichment. ==Applications==