The fit and finish is what you would expect from a reputable company like NGK. The wires are numbered straight from 1-4 for ease of installation. When paired with a set of Denso W16EXR-U spark plugs, my 20R purrs flawlessly. FYI, if you apply dielectric grease to the contacts, make sure it doesn't get on the rubber boots. You will have a hard time keeping it on the reel nipples as the lube will slide off of it.