Where can i order some JDM GSR spec pistons but in 82mm bore. I wanna do another LS Crank and LS rods in a GSR block but that combo with ITR pistons makes the damn P2H clearance so tight. I wanna run JDM GSR pistons for the lower piston height to get a better P2H clearance w/o using a 0.07" HG like I had to do on my last build.

 

why cant you run the USDM GSR pistons? topline makes an 82mm piston. you could try them out.

 

looking for more CR, usdm gsr would give me around 10.4-10.5:1 with the JDM gsr i should be around 10.9-11:1 with my gsr head

 

just run them, they are close enough. get flace valves if need be.

 

Already got supertech flat valves, I think you're right, usdm gsr pistons will get me to around 10.8:1 CR w/ the valves and milled head.