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On my 16 with the EBay cat less header it wasn't that much louder with 4" Rinehart's. The temp went way down, that was noticeable. I'm talking TC here. I love the sound of my new Jackpot mufflers just sitting in the driveway. Tuner is in transit.
A paddle drill is basically a flat drill bit for wood, available in most hardware, lowes, Home Depot, etc. you can also get a drill bit extender in different lengths for reach. Looks fairly simple compared to the tc cats.
As you can see I opened the pipe and cleaned the catalist off the pipe and used fireplace gasket for sound aborsption cause I like quite.Then welded with 6010 Lincoln rod.I'm sure the Harley pipe is aluminized carbon steel.Stich weld 1 inch at a time to prevent shrinckage as much as possible.
The photos show what I did.If you guys could shown me a better method Then I will try it the next time.
Sometimes decanting can hurt your performance. These engines need some back pressure to get good gains out of em. Now how much? That's up to the tuners
Did you take your headpipe off to just remove the cat or did you have it off for another reason. Seems it might be done while on the bike with just taking off the right slip on
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