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Drillled Exhaust Question

14361 Views 27 Replies 12 Participants Last post by  Dewd
I bought a drilled exhaust from one of our members with the 4 half inch holes. Is that the optimal amount of holes, or drilling additional holes make them louder or deeper in sound? I have heard that some have 6 and even 8 holes. I wouldn't want to drill more if there is no benefit.
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I only did a half inch hole in the center. I started with two 1/2 in hole in each then did 4 then 6 then the center + 2more for a total of 9 in each. Each step increased the loudness and tone a little each time.
Formerfuzz said:
No, I don't want to gut it, just drill out the inner baffle. I'll Get R Done tomorrow.
You might be happy just adding holes around the center. When I added the center hole it didn't make that much difference from the 8 holes in each. Of course I only did a 1/2 in hole in the center.







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Kuro1stGen said:
Toby said:
I only did a half inch hole in the center. I started with two 1/2 in hole in each then did 4 then 6 then the center + 2more for a total of 9 in each. Each step increased the loudness and tone a little each time.
Good lord Toby. Should have just removed the extra splinter that you had left so that you don't cut your hand on it.
ya that's funny but really isn't that bad hear is a pic. And it really sounds good without being obnoxiously loud
Formerfuzz said:
Okay. I picked up a new 1" Bi Metal Hole Saw and 12" Extension from Home Depot. Placed inside the 1" opening on each tail pipe until I felt it hit the Baffle Plate, it was a snug fit. A few minutes later they were drilled through. Just like the Exhaust Mod I did on my V Star 950. It added more volume and a deeper tone. For my liking, it is just enough without being too loud. It's enough to let the Cagers know you are near. I thought of buying the Cobra Slip On, but not anymore. I'm very pleased with the 4 half inch holes on the outer edge and the baffle plate drilled out. I recommend this mod for those who can't or do not want to drop big bucks on better sounding pipes. ;D
Good job Formerfuzz. I actually like the way drilled baffles sound. But don't like the way the stock mufflers look. And now that I dropped the rear 2 and a 1/4 inches the pipes drag before the the pegs hit. So when I can afford it I will swop them out for something that looks better and and gives more road clearance.
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