I agree with KC that to me, it's stuff that is nonstock or has otherwise been modified to improve streetability, handling, or other parameters besides just power. I mean, when you look at the antique technology in an AD truck, even a change to radial tires is "HiPo".

To me, it's a broader definition.


52 GMC 3/4 ton pickup
68 Big Block Vette
68 455 Firebird