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Nigel, how are they made internally and what is the weight?
I'm tempted to try making some thinwalled ss lightweight reverse cones for the Norton 920 lightweight project. If it goes well I would make a set for the Thrux as well.
The stock Thrux reverse cones are similar in proportion to your Theils and have a good sized straight thru tube inside like the Cone Ind. reverse cones. As such, restriction is negligible, but at 6.5 lbs each, they need to go!
The Cone Industry jobs aren't light either.
The saving grace there was they have a straight thru 2.5" that I used with a 2" two into one system w collector on the Egli.
I believe the Cone product weighed about 5 lbs, but with only one needed, it passed muster. For now!

What are we going to talk about when the EBikes take over?

Glen

<blockquote data-quote="worntorn" data-source="post: 406208" data-attributes="member: 590">Nigel, how are they made internally and what is the weight?I&#039;m tempted to try making some thinwalled ss lightweight reverse cones for the Norton 920 lightweight project. If it goes well I would make a set for the Thrux as well.The stock Thrux reverse cones are similar in proportion to your Theils and have a good sized straight thru tube inside like the Cone Ind. reverse cones. As such, restriction is negligible, but at 6.5 lbs each, they need to go!The Cone Industry jobs aren&#039;t light either.The saving grace there was they have a straight thru 2.5&quot; that I used with a 2&quot; two into one system w collector on the Egli.I believe the Cone product weighed&nbsp; about 5 lbs, but with only one needed, it passed muster. For now!What are we going to talk about when the EBikes take over?<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />Glen</blockquote>

[QUOTE="worntorn, post: 406208, member: 590"] Nigel, how are they made internally and what is the weight? I'm tempted to try making some thinwalled ss lightweight reverse cones for the Norton 920 lightweight project. If it goes well I would make a set for the Thrux as well. The stock Thrux reverse cones are similar in proportion to your Theils and have a good sized straight thru tube inside like the Cone Ind. reverse cones. As such, restriction is negligible, but at 6.5 lbs each, they need to go! The Cone Industry jobs aren't light either. The saving grace there was they have a straight thru 2.5" that I used with a 2" two into one system w collector on the Egli. I believe the Cone product weighed about 5 lbs, but with only one needed, it passed muster. For now! What are we going to talk about when the EBikes take over?:) Glen [/QUOTE]