The K and KH take slightly different exhaust systems, due to the increased stroke of the KH.
There used to be a guy in Kentucky or Tennesse who made perfect reproductions. I called Sporty Specialties to buy one, only to find out they had sold the last one about a month before I called. And the KY/TN guy wasn't going to make any more. Bummer. You might check with Sporty Specialties and see if the situation has changed, but probably not.
I purchased a KH set from Dennis Corso. The front pipe was OK, but the rear pipe was poorly bent and was un-usable. I had a difficult time convincing Dennis that it was defective. I have an original set (banged and beaten), so I mocked up the engine and frame, attached the original exhaust and took a photo, then did the same with the Corso exhaust. The problem was then obvious. I sent back the defective set along with my original set. He made up a new set, and about two weeks later, I got a nicely fitting set back. So he did ultimately stand behind his work - it just took some trouble to convince him there was a problem.
The original rear pipe has a "saddle" where there rear cylinder pipe connects to the main pipe. Both the Corso set and the V-twin set do not have that - the pipes are butt welded. Who cares?
Corso sold his exhaust business to
www.thegasbox.com You should give them a call and see when/if they will be making K and KH sets.
V-Twin does sell a K exhaust 30-1083 and a KH exhaust 30-1082. However, V-Twin's quality varies - some parts are pretty good, others are junk. Quality for a particular part varies too. If you decide to get one, I'd make sure you have full return privileges from the seller. And I'd have the bike ready (at least temporarily) for test-fitting the exhaust. If there's a problem, you want to return it right away, not a year down the road.
Has anyone used the V-Twin exhaust system? Does it fit?No easy solution for these exhaust systems. A couple of years ago, I started looking around the country for shops that can do mandrel bending of exhaust pipes. All but one said that they could
not do 1-1/2 inch pipes, as there are no car applications for 1-1/2. The lone one who could said they could do 1-1/2 could not do the saddle. I didn't pursue this any further.