Does drilling holes in a truck muffler really work, if so how to do and where to start? Thanks?
Yes, drilling holes in a muffler will make it rust out quite a bit faster than it otherwise would. But why would you want to do that to it? That plus the fact already pointed out about failing inspections (if applicable to your area) are about the only benefits you will gain. Muffler does not need a drain hole for moisture. The heat from being driven should burn off any moisture that might collect in there. That’s one of the reasons why vehicles normally driven only short distances should be taken on the highway on a regular basis (like once a month or so) as well as several other benefits. —– It will probably not make it sound too much louder, and if it did, it probably wouldn’t be quite what you’d be expecting anyway. Besides, if you do it, and it does sound terrible, then the only way to fix it is to replace the muffler. Best thing to do is to buy a decent performance exhaust system, cat-back systems usually sound the best. You might be able to find websites with links to play a
