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-   -   Hardin cyclones (https://www.offshoreonly.com/forums/general-q/363880-hardin-cyclones.html)

bigboat28 11-16-2019 08:16 AM


Originally Posted by KWright (Post 4715147)
Ran these on my 565's. Good alternative to the gils with no tailpipe modifications. I was very pleased with the quality.

Any power loss?

Crude Intentions 11-16-2019 08:33 AM


Originally Posted by bigboat28 (Post 4715184)
Any power loss?

over gils I highly doubt there would be. From a long tube sweeper style yes. It’s pure runner length.

green lightning 11-16-2019 11:19 AM

I had the Gil cast aluminum manifolds that leaked and became impossible to wield went with the cyclones and could not be happier https://cimg8.ibsrv.net/gimg/www.off...b19d4c245b.jpg

KWright 11-16-2019 11:21 AM

Never ran them In comparison with the gils. They were an upgrade when I built my 565's. I knew i wasn't keeping my 35, so I didn't want to spend a ton on complete new exhaust. We made good power with them over 750. I would use them again if I didn't want to do completely new.

Crude Intentions 11-16-2019 12:02 PM


Originally Posted by green lightning (Post 4715207)
I had the Gil cast aluminum manifolds that leaked and became impossible to wield went with the cyclones and could not be happier https://cimg8.ibsrv.net/gimg/www.off...b19d4c245b.jpg

how long have you had them? I’m really thinking this is the route I will go. Don’t wanna drop a fortune on all new stuff. My tails are already fairly new.

lush 11-16-2019 12:03 PM

I have been eyeing these also. What do you think will be the most reliable in the long run cyclone, cmi fusion or eddie marine manifolds?

Crude Intentions 11-16-2019 12:33 PM


Originally Posted by lush (Post 4715210)
I have been eyeing these also. What do you think will be the most reliable in the long run cyclone, cmi fusion or eddie marine manifolds?


if you already have gils these seem like the best bet. You don’t need new risers/tails.

green lightning 11-16-2019 01:30 PM


Originally Posted by Crude Intentions (Post 4715209)


how long have you had them? I’m really thinking this is the route I will go. Don’t wanna drop a fortune on all new stuff. My tails are already fairly new.

I bought them in 2009 for use in the 2010 boating season

lush 11-16-2019 01:52 PM

I just removed the stock manifolds and did away with the quick and quite.

Crude Intentions 11-16-2019 09:28 PM


Originally Posted by green lightning (Post 4715216)
I bought them in 2009 for use in the 2010 boating season

nice. So you’ve had them a while and they’ve held up. That’s good to hear.


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