Yes, standard pistons, they're fine as long as you keep inlet temps under control, and don't stray over 12psi for too long.
I think to use O series pistons I'd need M series rods, and I'm leaning towards forged rods and pistons with dta management.
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It never got fast enough for me
Hunter S Thompson
R.I.P. Peter David Scott 18.07.59 to 21.11.16
Will be missed by us all but we will always remember you.
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