i have a set of stock turbo rods with arp bolts already connected to a set of speed pro hyper pistons .30 over 8.5:1 compr. when used with stock 8445 irons.this set up was being used on a stock 109 turbo crank...this is your chance to build a lot of power for cheap!!!! these pistons are great and can handle anything you throw at them.its all in the tune!!! you can run these pistons at 30psi no problem long as you dont detonate.detonation will kill anything..so hurry dont let this super deal pass you by.call me at 313 614-7776 im in DET.48214 Shannon