It's interesting looking at the numbers on the Jett website to see the huge gains on an OS .46. It looks right to me here, I hope this cut 'n' paste job posts correctly. 16,700 on a 10-6 APC, the SJ46 ain't too shabby in the hp department.

[TABLE="width: 600"]
[TR]
[TD="bgcolor: red, colspan: 4"]Jett-Stream Muffler Comparison Data - Sport Jett .46
[/TD]
[/TR]
[TR]
[TD="width: 150"]Prop Size (APC)
[/TD]
[TD="width: 150"]Stock OS Muffler
[/TD]
[TD="width: 150, bgcolor: #ff9999"]Jett-Stream Muffler
[/TD]
[TD="width: 150, bgcolor: white"]Turbo-Jett In-Cowl
[/TD]
[/TR]
[TR]
[TD="width: 150"]10 x 6
[/TD]
[TD="width: 150"]14,700 RPM
[/TD]
[TD="width: 150, bgcolor: #ff9999"]16,700
[/TD]
[TD="width: 150, bgcolor: white"]15,800
[/TD]
[/TR]
[/TABLE]
[TABLE="width: 600"]
[TR]
[TD="bgcolor: blue, colspan: 4"]Jett-Stream Muffler Comparison Data - OS .46
[/TD]
[/TR]
[TR]
[TD="width: 150"]Prop Size (APC)
[/TD]
[TD="width: 150"]Stock OS Muffler
[/TD]
[TD="width: 150, bgcolor: #ff9999"]Jett-Stream Muffler
[/TD]
[TD="width: 150"]Turbo-Jett In-Cowl
[/TD]
[/TR]
[TR]
[TD="width: 150"]10 x 6
[/TD]
[TD="width: 150"]14,200 RPM
[/TD]
[TD="width: 150, bgcolor: #ff9999"]15,900
[/TD]
[TD="width: 150"]15,400
[/TD]
[/TR]
[/TABLE]