The quench area has been cut off lol yes they are mahle. I do still have that set of 88mm wiesco pistons thats whats going in my motor since i have stock sleeves. I also picked up another sleeved block so we might build him another bottom end just to have laying around. I just hate buying 800.00 dollar rods . I heard that the rod bolts were the weak link in the f23 stock rods . I mean you realy dont need rods for na unless your turning the motor 9,000 rpms. After looking the rod bolts in the f23 rods and the f20b rods are identical and i beat the hell out of several f20b turning them to 9,000 no problems so maybe stock rods would be fine. I need to just build a budget h22 ,f23 botom end with stock shit turn the piss out of it and see what happens . I mean whats the worse that can happen you mess up a 150 dollar block and a 100 dollar ctrank and rods who cares. I can get 13.1 compression on stock h22 pistons on f23 rods and crank with a little cutting . I mean i could build a 13.1 compression 97mm stroke stock bottom end that would be nasty maybe ill do it.