Ever since a Junkyard LS 5.3 was boosted to 1000 hp....its madness.
Really not that new...
Was done with Big Chevy & Pontiac 389 .
389 was 1st to 1000 hp by drag racers..no aftermarket parts....ISKY RACE CAMS & GMC Supercharger.
Hillborn.
Vertex Magneto.