if u dont want paper also can. but then u need to punch back ur original engine number, provided its dohc b series. if sohc also can but then puspakom will be suprised to see dohc engine with b16a marking on it.....ekekeke
if u not planning to endorse the engine (mean illegally punch back the number to ur current engine number), then no need the paper. if u want to legally registered the engine regardless into crv or civic, u need a paper to endorse it.
if u buy b20b block n punch back the number then put it inside ur crv, then no need paper.
guys really need some advise...wat is the best ecu for mr...i was thinking bt f con all the time but others said haltech..power fc...n motec oso...jz need some opinion...blur d...thx :albertein