RE: Evolution .46 muffler screw needed
Steve,
Don't bother to search for 'proprietary R/C model' bolts...
Tower will live long even if you don't buy two bolts from them; and have them shipped.
These muffler bolts are rather simple, M3.0 x .5, or M3.5 x .6 items, which your local hardware supply could practically give away...
Just take the muffler and one of the old bolts with you, to make sure you get the proper metric thread and length.
Oxide coated, galvanized, or stainless ones will last longer; without corroding, or becoming stuck.