b18b has 9.2:1 compression
k20a2 has 11:1.
even if the gap is the same, i wouldnt use it because the type r leads most likely to be 1 step colder than the stock b18b leads.
but i dont have the gsi service manual nor dc5 service manual so i cant
be absolutely certain in terms of heat rating and gap.
afaik dc5 itr stock use iridium while b18b stock use platinum?



Reply With Quote
Bookmarks