ORIGINAL: rcdude7
ORIGINAL: w8ye
It is likely that it is
The Evolution is a derivitive of the Magnum XLS 61 which is a copy of the OS 61 FX
These engines are all the same
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O.S. .60 FP & LA, .61 SF, .61 FX,.65 LA, .75 AX
Evolution .61 NT (not the .61 NX)
Irvine .61 (NEW -
bolt through)
Jett .67L -.76L (not the .60L)
Magnum .61 Pro
MDS .68-.78 FS Pro
Thunder Tiger .61 GP, .61 Pro (
bolt through)
Webra .61-.75 P5-H </font>
Your list is not complete, you forgot the OS .91FX and the Leo/megatech .61
Sorry, I could not resist
And the Magnum/ASP XLS 91
But .91 engines tend to run hot when used with mufflers intended for .61 engines