redunshee
Addicted to ArboristSite
The ModifiedMark 3700 muffler mod is unsurpassed in functionality, beauty and........COOL factor.
There are several posted here in this thread.
He is also doing a louvre style muff mod now that, although not NEARLY as cool is very functional and takes about 1/4th the time.
Mike
Yea, I used to drill two 1/2 in. or so holes in the bottom of the muffler after enlarging the holes in the baffle. After seeing Mark's side discharge slot, similar to the 4000, I now use that approach. Haven't tested either method to see if there are perf. differances but my gut tells me the front holes may allow for more airflow.
Bob