Piston length

[Cholo]

Hi, someone know if there are a piston with more length than the stock?. I want to try shorter timing in my CR cutting the base of my cylinder 1mm, but the problem is when the piston will be in TDC, the crankcase will be exposed to the exhaust pipe 1mm because the piston length is not enough to close the bottom of the exhaust port.

My piston is a ¡Vertex that is same length as stock. Excuse me for my english, I´m spanish.

[Roostius_Maximus]

all 500 pistons available are the same length, on most cyls the max you can remove is .015""from the base and .005" with the cometic gasket instead of OEM.

[Cholo]

Thanks for the help. I´ll try cut 0.015''