Originally Posted by SharpByCoop

I ran the OEM components up to 591 hp and at that point the rods bent like an S. Fortunately no damage, but that happened. 550 is really close to that.

Lower end built to exactly your query: K1 rods, ARP studs, OEM gaskets and bearings, and Wiseco 9.0:1 pistons. Had the rotating assembly/pistons/rods balanced as well.

This has the ability to sustain more than 600whp now, with upgraded fuel components (which I also did.)

I thought the 9:1 pistons would be doggish. No way. The engine has SO much torque that after the tuner added ignition timing there, it drives as responsive as it used to. Not a notable loss at partial throttle.

My experience. It also costs a FORTUNE to remove engine to do all this. I would lock it at 525whp and ride into the sunset if you don't plan on pushing further.

Coop