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So I am going to do some experimenting with the factory exhaust tip on my 17 kodiak . I will be using a butt dyno and listening for exhaust popping to see if I get better response and flow. I have a EHS fuel controller with the canned kodiak tune, so if I do get some exhaust popping I can adjust which tells me I’ve increased my flow.
Ok so my first experiment is cutting apart the factory tip and removing the tail pipe intrusion into the spark arrestor. The spark arrestor has 2 welded spots to grind off so you can remove it.( first photo you can see I had to grind a lot of the weld off to remove the screen, apparently they didn’t want it to come off ) and then I cut the 4 inch pipe that went into the arrestor. I tack welded the arrestor back on and reinstalled into the muffler. I didn’t get a chance to ride the kodiak last night as it was getting late but i did start it and it did seem to iimprove the sound a bit. I’ll get a chance tonight to give it a few test hits around the house to see what the butt dyno tells me. 3rd photo is my reinstall tack weld for the spark arrestor. I also snapped a photo of the inside of my muffler. You can see the factory holes in the baffle.
Ok so my first experiment is cutting apart the factory tip and removing the tail pipe intrusion into the spark arrestor. The spark arrestor has 2 welded spots to grind off so you can remove it.( first photo you can see I had to grind a lot of the weld off to remove the screen, apparently they didn’t want it to come off ) and then I cut the 4 inch pipe that went into the arrestor. I tack welded the arrestor back on and reinstalled into the muffler. I didn’t get a chance to ride the kodiak last night as it was getting late but i did start it and it did seem to iimprove the sound a bit. I’ll get a chance tonight to give it a few test hits around the house to see what the butt dyno tells me. 3rd photo is my reinstall tack weld for the spark arrestor. I also snapped a photo of the inside of my muffler. You can see the factory holes in the baffle.