Hi everyone,

i am planning to have a rebuild my JDM 2004 AP1 Facelifted F20C,

From the beginning i decided to buy Mahle FRM piston 12.5CR 87.25mm with Carillo Pro A F22 Rod,

but after a discussion with my local machine shop, seems they dont have any confidence even i gave him the guideline for bored and honed block from original manual.

So now i am started to think about keep my JDM AP1 piston to avoid any pison failure if they are good enough to re used, just change new rings from 06+ AP2, seems they are a better design isnt it?

And swap in the Balanced and Micropolished F22C Crannk and F22C original rod, since i used stock piston with 22.7mm pin diameter so this is a direct bolt on without any machine work, and they are floating rod and good enough already for 250~ whp. Just a little bit heavier than Carrillo Pro A.

I had do a research for AP2 Rod + Crank plus JDM F20C piston = 12.7 CR ! Am i right? seems its a beast for All Motor setup and even higher CR than Mahle piston.

Finally i found that is no point to buy after market parts, and i heard S2000 OEM piston is forged already.

Any comment ? anyone tried this combo before?

Thanks!