ORIGINAL: mpascual
Marketing matter:
There is a difference between ABC type and true chrome abc .
TT 46 pro is an ABC type engine but it has nikel plated liner. It isn't has a true chrome plated liner, but piston is made from alu. liner is brass made AND NIKEL PLATED, that is : ABC type.
Although it's nikel plated liner it's a great engine, powerful, cheap and reliable.
What makes the TT an ABC or ABC type engine if it has no chrome? If it is nickel plated, then it is indeed an ABN engine, and not an ABC one.