By-Pass hose

Those fitting wont work with a stock hose . They are too long. There is a kit of correct hose fittings. I've seen it on ebay before.
Only aternative I've seen was bushings and 3/8 nipples along with a 3/8 molded hose. The guy claimed smaller hose didn't cause any problems.
The trick to installing is fold the hose double and start on both nipples at once.