Ultimate Hot Rod Glossary – The I’s, J’s and K’s
Indian (also “Tin Indian”): Pontiac (for the grille badge).
Interference Head: A cylinder head design in which valve-to-piston clearances are tight enough so that if valve timing is off by a significant amount (as when the cam timing belt/chain breaks), one or more valves will come into contact with the top of their respective piston(s) – resulting in bent valve(s) or worse.
Jetting: The process of changing the fuel jet size(s) in a carburetor to tune the fuel/air mixture.
Jimmy (or Jimmy Six): GMC straight 6. Any GMC product, such as a compressor used on 2-stroke diesels used as a supercharger.
Kit Car: This refers to a reproduction of an existing automotive design sold as a kit that the builders assemble themselves.