Where do Sealed motors run?

[Rick Leininger Jr.]

Originally Posted by Tom Meyer

IMCA dirt track uses a sealed 350/355hp motors in hobbystock and sportmod classes or what they call a 602 crate. They come from GM with twistoff head, intake, oil pan and timming cover bolts. They also have cable ties on other bolts that make them IMCA legal. They also use a 604 in the A mods. But like everything else it who you know there are many enhanced motors out there. Tom

Yes, the enhanced 604 crate motors out there make about 60hp more than the best tuned factory GM 604 crate motors, the twist off GM 604 bolts aren't hard to find.