Thread: Freeflow Exhaust Resonator
06-19-2011, 10:42 PM #1
Freeflow Exhaust Resonator
For you guys that have the Riva freeflow tube here is a cool little addition that takes a some of the edge/drone off the freeflow tube sound.
The freeflow tube itself acts as somewhat of a megaphone being hollow straight aluminum tubing. Splicing in the Vibrant 1796 3.5 inch all stainless bullet style resonator is a snap, and gives a bit of a raspier and quieter sound with no power loss.
Pics show installation on my 09 FZR i just picked up.
Can be done with only a hacksaw, and some decent hacksaw skills.. The freeflow tube is aluminum so it cuts easily.
Silicone couplers are never exposed to any of the internal exhaust action as the freeflow tube OD is the same as the resonators ID, so its a perfect slip fit of the tube in the resonator.
06-20-2011, 04:29 AM #2
- Join Date
- Jan 2011
- Brisbane Australia
Looks neat !!
I was wondering if you or anyone else had thought of using exhaust heat tape to make the free flow exhaust a bit quiter and less tinny. It would also have the added advantage of reducing heat inside the hull !!
06-20-2011, 05:34 AM #3
Thats a great find! Thanks Ross.
I googled it and found it on amazon for $76
06-20-2011, 07:40 AM #4
- Join Date
- Apr 2009
- Cayman Islands
Is this the part?
Inlet Diameter: 3.5"
Outlet Diameter: 3.5"
Muffler Size: 4.25" Round x 9" Overall Length
06-20-2011, 08:02 AM #5
12-09-2011, 12:27 AM #6
Hey Ross ,
How has that set up held up over the summer, just thinking that it may flex a lot and maybe tear the couplers........I would like to reduce the drone, but not want to risk a leak at the wrong time or place.....
12-09-2011, 09:02 AM #7
Its really almost impossible for that to happen as the OD of the freeflow pipe is the same as the ID of the resonator and the pipe slips inside of the resonator. Perfect little slip fit. Silicone hose couplers are never exposed to any exhaust gases, and dont really support much because of the inner slip fit of the pipe to resonator.. Has held up great..
12-09-2011, 09:11 AM #8
Ross I would be curious to see how your stock exhaust outlet is holding up with the extra weight of the resonator. The reason I ask is because mine teared after 65 hours of having the Riva FF exhaust and offshore riding. It seems the stock exhaust rested on the pump tunnel so there was very little weight on the stock outlet, unlike the FF. Something to keep an eye on
12-09-2011, 06:17 PM #9
Did you ever make a video of this setup? Rather than put the stock resonator crap back in im really thinking about trying your resonator idea. Because if the drone doesnt go away with rear exhaust then im not hacking a 4" hole in my transom!
12-09-2011, 11:02 PM #10
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