Yep. That is exactly why I now have dedicated, on-board ear-pro. It's far too easy to just blow it off. Once you're in and seated and ready to go, the last thing anyone wants to do is climb back out and hunt around for protection. Now, it's always on board and ready for use. I'll probably also grab some disposables for those folks who are too self-conscious to wear over-the-ear protection.
And yes, the Gama Goat does have a muffler which is located under the hood and just forward of the hinge points of the hood.
But, like the M151, the Gama Goat possesses a large number of surfaces through which noise resonates....just the nature of the beast.
Comments about the level of noise made by the Gama Goat are sometimes made rather tongue-in-cheek and yes, even sometimes OVERstated but it is astoundingly loud when the engine is wrapped up and pulling (which is almost all the time when in motion). After a few minutes it begins to feel like the old drill instructor is back. You know, the one who puts the garbage can over your head and beats on it with a baton? Yeah. THAT guy.
These older Detroits are an antiquated system. They use their engine oil as a method for cooling and the jackets aren't wet (exposed to normal coolant) but instead, are sprayed with oil as a means of removing heat and that, dear friends, requires RPMS and a lot of oil (one of the major reasons we Goat owners so faithfully check fluid levels).