Bill Denton wrote:
Wouldn't mods such as pistons and exhaust systems possibly result in a
change in the engines theoretical redline?

I suspect the piston change "might" chage a tiny amount, although other
160hp O-320s still have the 2700 RPM redline. I doubt the exhaust would
change it. As others have said, the redline would be more related to
engine tolerances and balance, as well as valve train design (spring
tension). None of those things change with the piston or exhaust change.


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