For that kind of power, I'd recommend something like Crower or Pauter rods. I ran Pauter. You can see my block/components here: https://www.honda-acura.net/forums/s...d.php?t=142746. Final setup when it was sold making 457 whp / 379 wtq: https://www.honda-acura.net/forums/s...d.php?t=195592.

At 9:1 and 600 hp, you will need MUCH more than 450's. I was running 550's making 380 whp pushing them to 100% duty cycle at 7k RPMs on about 16-18 psi on a Garrett T3/T04E 57 trim 60 A/R turbo. You WILL need 1000's if you plan to make that kind of power and expand even a little. It wil be tough to tune at idle, but you can't get around it.

I hope you're sleeving it, too. With the right tune, you might not need them, but I wouldn't risk it. JE's might work for you. They're not 'awesome' pistons. I'd go with something more like ROSS, CP, or Arias. jmo