My 79 GS850 had mufflers that were totally shot when I bought it. Not wanting to spend $300+ on scratched up originals and not wanting a 4 into 1, I started looking for mufflers I could graft onto my original head pipes. After searching craigslist for foriegn bike mufflers and coming up short, I began to notice lots of HD mufflers going for peanuts. I guess nobody who owns a Harley wants the quiet stock exhaust, so they sell dirt cheap. I picked up a full exhaust from a softail, brand new and taken off by the dealer, for $35. Not a scratch on it. So I cut my pipes right after the y on either side and started lining things up. I thought I would need some sort of reducer, but low and behold the pipes are the exact same size! I cut a 2" section off the harley head pipes and ground the joint side so that it put thecorrect angle on the mufflers and welded it up with my 120v Lincoln 140 mig welder. For the support bracket I turned the mufflers so that the mounts face the ground and made an offset L bracket to bolt it to the frame (goes straight down and angles back at the bend). Anyhow, here's how it turned out:
It sounds fantastic too. Not as quiet as stock, but not obnoxious. More like a well designed aftermarket sound. Works fine with the stock jetting; no lean surges or popping.
So, there you have it. Feel free to ask any questions! I'll be happy to get a close up shot of the brackets if anyone would like to see them better.
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