Combustion Technologies Inc.

All pistons manufactured by Combustion Technologies are made in the USA from high quality aluminum forgings. We do not make any pistons from castings! All Lycoming pistons are designed to utilize Lycoming Ring Sets and Piston Pins so you do not need any special rings or pins.

Available in Standard & P10 7:1 Compression Ratio - for Parallel Valve 5.125 Bore For experimental or ground use only Find a Distributor

Available in Standard, P1, P3, P10 & P20 Uses Keystone style compression rings part number ASC238446 - STD, P10 or P20. For use in Pratt & Whitney R985 Wasp JR Series Engines Available for Purchase at Sun Air Parts

These piston ring sets are FAA-PMA by Superior Air parts. They are aviailable for Steel and Chome cylinders and fit all Combustion Technologies pistons for 5.125 bore Lycoming engines. SAP SL3601-SC Ring Set = 2 each SL74241A & 1 each SL73857A - For Seel Barrels Only! - Not for Chrome Barrels SAP SL3601-SC P10 Ring Set = 2 each SL74241A P10 & 1 each SL73857A P10 - For Steel Barrels Only! - Not for Chrome Barrels SAP SL5401-SC Ring Set = 2 each SL74673A & 1 each SL73998A - For Chrome Barrels Only! - Not for Steel Barrels

This piston is made in the USA from a high quality forging as are all pistons manufactured by Combustion Technologies. This piston is a domed high compression replacement for Continental O-520 series engines and weighs approximately 1195 grams. This piston utilizes aluminum forging alloy 4032, common to most aircraft pistons - Lycoming and Pratt & Whitney, and does not utilize an iron ring groove insert. This piston accepts standard Continental 5.250 bore ring set and piston pin.

Available in Standard & P10 Combustion Technologies has piston rings available for R985 and R1340 Series engines. They are all FAA-PMA and fit all Combustion Technologies Pistons for Pratt & Whitney Engines. Find a distributor for Pratt & Whitney Piston Rings