Hi guys, I would like some input and advice for Nissan Serena 2.0 (C24) original engine QR20 but having engine and gearbox problem after overheat issue. Decide to transplant the engine from halfcut. I found two (2) option and the price very much the same:- 1. Serena halfcut with SR20 2. Serena halfcut with QR20 Since this car will be use to ferrying family in long distance and very much required some power while climbing the hill (Sabah). Well inform if I take the QR20, will be much PnP job and less cost and cant expect the improvement of power. How about the SR20, is it will give more torque compare/power to QR20? BOT will be last option as it will need bigger fund for properly tune and build. Which is very much profitable and to transplant and less problem in future. Your advice and suggestion very much appreciated.