Mb5 piston orientation

Bought a stock replacement from treats. There are no arrows just the letters "IN" cast into the top. I'm assuming that those go towards the intake?

Side note, should t the piston have a window?


Re: Mb5 piston orientation

Dirty30 Dillon /

In towards intake.

And no, the stock piston is not windowed

Re: Mb5 piston orientation

Cool thanks. Would a window make me more blasty? Or would t do much? Seems like every reeded cylinder has one

Re: Mb5 piston orientation

Dirty30 Dillon /

I am a proponent of leaving MB5's stock, so I wouldn't.

But theoretically, it could improve the flow

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