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I say buy a new set. for the money (mine were like 10 buck's!) it is worth it. and there is a torque spec. cant remember what it was I just put short shot's on my bike. but spec's came with new pipe's.
I didn't change my gaskets when I changed my pipes and I had a leak. I went back and changed them and the leak went away. They are $12 for a standard set and it doesn't hurt. I went tot he service desk and asked about the specs. The guy pulled out his book and gave them to me. I think it was no more then 18 pounds per INCH, but don't quote me on it.
Its just too cheap not to. I'm not to sure how it works but when I went to the dealer for aset to use when I put on my new pipes the parts guy asked if I was replacing the stock pipes or putting on aftermarket ones.
When I asked why he needed to know he told me that they stocked two different ones. They had the normal ones used for stock pipes and a square kind for aftermarket pipes.
I put the square ones in for V&H pipes and havn't had any problems at all.
Just be sure you get ALL of the old gasket out before you put the new one in. The gasket is made of a woven metal materal like steel wool and can get packed in the head so tightly that it looks just like the head and you think all of it is out but it isn't.
Definitely new gaskets. For what it's worth, When I changed out stock exhausts last year to V & H true duals, I went to my HD dealer to buy the screaming eagle gaskets. One of their tech's happened to be at the counter and suggested the stock gaskets - said they had had better luck with them sealing with the V & H installs they had done. I followed his suggestion and have had no problems.
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