trespasser Posted July 26, 2016 Share Posted July 26, 2016 I am rocking an Arrow Thunder exhaust with the baffle in. I would like a bit deeper sound, but with the baffle out it's too loud. Has anyone cut or drilled their baffle? Example: Or with a larger pipe welded in: Please share your experience Link to comment Share on other sites More sharing options...
thetruck454 Posted July 26, 2016 Share Posted July 26, 2016 I'm in the same boat as you, but I've been too intimidated of cutting up the db killer. '15 FJ-09 with an aftermarket parts addiction Link to comment Share on other sites More sharing options...
GoldenPenguin Posted July 26, 2016 Share Posted July 26, 2016 just start by cutting a couple inches off then keep moving up as necessary. Or don't be a wuss and just leave the baffle out... Link to comment Share on other sites More sharing options...
thetruck454 Posted July 26, 2016 Share Posted July 26, 2016 just start by cutting a couple inches off then keep moving up as necessary. Or don't be a wuss and just leave the baffle out... Some of us want to be able to hear when we're older :-p I wear earplugs and after a 5 mile ride with the db killer out inturned right around to reinstall it. '15 FJ-09 with an aftermarket parts addiction Link to comment Share on other sites More sharing options...
GoldenPenguin Posted July 26, 2016 Share Posted July 26, 2016 Some of us want to be able to hear when we're older :-p I wear earplugs and after a 5 mile ride with the db killer out inturned right around to reinstall it. What?? Huh? Did you say something? I need you to speak up, I rode to work today... Link to comment Share on other sites More sharing options...
trespasser Posted July 26, 2016 Author Share Posted July 26, 2016 What about drilling more holes, did anyone try that? Link to comment Share on other sites More sharing options...
trespasser Posted July 28, 2016 Author Share Posted July 28, 2016 Drilling one 10mm hole in the end of the db-killer worked quite well imo. It kinda rounded off the sound, made the sound a tad deeper and dampened the pops. I think i will leave it like this for a while Link to comment Share on other sites More sharing options...
adjuster Posted July 29, 2016 Share Posted July 29, 2016 I was going to suggest the same thing. Your DB killer is all about sound, and flow control. You do create a restriction to flow with the DB insert, but you can increase flow out by adding holes not in the "Tube" part, but in the "Cap" that is held in place by the snap ring. As suggested, look at how your DB insert is installed. Some have a locating bolt, some are snap rings. Choose a location that is on the lower part of the DB insert, so you don't see the hole easy. Measure the gap between the insert flange, and the "pipe" and drill one hole in it about the size of the space between the pipe and the insert mount. Try it out, if not loud enough, drill another hole exactly opposite of the first one. (This will keep the holes looking nice and even. You can go to two holes, 3 holes, 4 holes or whatever amount of holes you want, and it will improve flow out of the muffler, while "adding" noise levels that get past the DB insert. If you don't like the hole, just put a simple bolt/nut into it? But one hole is not going to suddenly make the DB insert totally too loud. Another option is to measure your insert diameter, and ask your local parts store, if they have any freeze plugs that size? You can then drill holes into the freeze plug, slap that into the hole, put your snap ring in to retain it, and see what works best sound wise. Various sized holes in the freeze plug will give you whatever flow v/s sound limit you want. Link to comment Share on other sites More sharing options...
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