Mahle forged pistons for Supercharged 4.6

footbrake

New Member
Aug 28, 2009
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Well I am forging my short block to make way for more boost.
I found a good deal on some Mahle 4032 forged 16cc dished pistons.
These are the same pistons that roush usedinit p51 and 540r engines.
but I cant find any info on waht kind of boost they will take, but I did find a post from a guy who
had a 2010 540r that all the pistons failed after the top ring hammered the ringland down on the 2nd compression ring and caused it to stick the 2nd rings.

He didn't say how much over stoc boost he was making though.
anyone have any info on these?
Ideas?