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  #1 (permalink)  
Old 01-24-2018, 12:54 PM
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exhaust gasket: flat vs tappered

Does it matter which of these you use. I see both are recommended for just about all HD engines made since 1984.
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Old 01-24-2018, 02:45 PM
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Ive always used Cometic tapered wire gaskets on both my twin cam and Ultima with no problems.

Same as these on eBay -

https://www.ebay.co.uk/itm/COMETIC-H...19.m1438.l2649
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Old 01-24-2018, 07:42 PM
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depends on if the pipe ends are flat or tapered.
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Old 01-25-2018, 09:01 AM
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Interesting, 2 sets of ultima growl pipes i bought for my ultima engines came with funky looking seemingly crash-able tin gaskets[ not wire mesh] .
They fit perfect in the ports.
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Old 01-25-2018, 12:21 PM
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I use factory harley screaming eagle flat ones on all my pipies
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Old 01-29-2018, 04:48 PM
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they both work
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Old 01-30-2018, 12:35 AM
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Quote:
Originally Posted by STEINBVG View Post
Interesting, 2 sets of ultima growl pipes i bought for my ultima engines came with funky looking seemingly crash-able tin gaskets[ not wire mesh] .
They fit perfect in the ports.
Yeah I had a set of those they looked funny, I never did use them. Im sure they are fine..
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Old 01-31-2018, 05:42 AM
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Just used a set of round copper gaskets when I changed out to a short 2-1 pipe on the Texas chop. Had to use the low profile type with the torque cones. Super easy to use.
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Old 01-31-2018, 10:03 PM
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The small flat round gaskets we typically use for performance. The cone shaped seal better but have a tendency to squish into the port restricting the flow a tiny bit. Not sure how critical the obstruction is but I have the small flat ones in my hotrods 113. Some guys will stack 2 sets of the small ones foe a little better crush and seal. They both will work in any evo or newer engine.
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Old 02-01-2018, 04:14 PM
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Its been a while since I wrenched so much on a custom. It took me a while to remeber why I used the tapered gaskets on my last bike. The thicker tapered gasket set the pipes out just a little bit more , just enough to fit the bottom exhaust mounts.

BtW John, thanks for getting "The Fix" Jackshaft in the mail so fast.
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