2021-01-01 - Overbore Engine
Q.
If we build our engine 40 over - will that push us into EC, or cost us points? If points, how many? Thanks in advance.
A.
If the overbore you stated is within factory rebuild specs and uses stock pistons, those to items would be legal
if the overbore has to have aftermarket pistons, then the engine is permitted in E.C class