Can anyone answer this question

[p76rangie]

I have been asking all around the world this basic question and no one seems to know the answer. How do you tell the difference between High Comp and Low comp pistons in a 4.6. i don't need an answer like the piston crowns are different sizes without knowing the exact differences.

[TerryS]

Ask RPI Engineering. They would know since they build them, and I have found them to be very forthcoming with info.

[p76rangie]

Originally Posted by TerryS

Ask RPI Engineering. They would know since they build them, and I have found them to be very forthcoming with info.

I had already contacted RPI and they did not have the answer.

[shainamathew21]

I don't have idea about it.