This is a overhaul gasket / seal kit for the 377 UL engine This set exceeds the MFGs specs ,
We run em in our trikes and use them in our shop for the past 11+ years.
This is set is for 62 mm bore 377 rotax.
Rotax 377 pistons, rotax 377 top end, 377 gaskets. 377 aircraft engine top end kit, rotax pistons.