[R2RO]

You shouldn't lower your compression ratio without first consulting your tuner on the benefits and cons for both keeping stock compression or lowering it, also for the amount of power you want to push out of the engine.

Personally for my build i'm staying with the stock compression with some (Custom CP Pistons, and Carrillo H Beam rods) because I don't think the trade offs you get with lowering your compression is worth it.
i.e. Lower gas mileage, lower grade fuel(usually), and etc.

But if you want to lower it, all you need is some low compression pistons from either (CP, JE, Arias, Manley, and etc just to name a few) just to name a few.