OK so I looked online and found that I do need an ECU harness adaptor. Im making a list of what I can use on the B16 in the B18. Can I use the sparkplugs from the B16, they only have 100 miles on them. Oil filter, again only 100 miles on it. Exhaust gasket, 100 miles. Lightweight flywheel and clutch. Im keeping the S4C gearbox but want to make sure they will work with the B18. Sorry for all the queations, just want to makes sure.