Welcome to Bullfrog Motosport!
Our flat top big block forged pistons are sold with the following components:
Select the appropriate bore size and compression height you are needing.
Stock compression height for Honda GX390, 420cc and 460cc pistons are 1.100". Our .900" compression height pistons work with our 4.650" length connecting rods.
The 99mm bore piston comes with piston rings.
Piston rings must be purchased separately except for the 99mm bore size.