Yes, I'm showing about 1.38" on the spacing of mounting bolts.
So what are the prices and weights of the tongue and tube you have?
HI Allan
My tongue mufflers are high quality CNC products and weigh about the same as all the others out there. depends on which one you are asking about, the Brodak 40 tongue is the lightest, the ENYA 60 is the heaviest .5 ounce is average
My CNC product TUBE mufflers are very light and weigh just a little over 1 ounce, they have no front or rear caps to blowout or come loose
the Aero Tongue mufflers are 18.95
the CNC Aero Tubes are 39.95
Regards
Randy