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Effective, Real world, Race & Street Proven Parts & Accessories
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This easy, 5 minute clamp on device allows you to run a fuel return line from either fuel injection or a carburetor back to the tank with no modifications to the fuel tank, and without removing it. It just doesn't get any easier than this!
Running it a fuel return line removes hot fuel from the engine compartment that would be otherwise waiting to enter the engine, and empties it back to the tank allowing cool fuel to be sent back up to the engine. This constant flow reduces fuel boiling, vapor lock, and provides easier starting and smoother running during hot conditions. This also keeps fuel fresher especially on short start-ups due to the entire contents of the fuel tank being recirculated in just minutes of running. Also mixes in fuel additives much faster and more efficient.
Simply remove your fuel filler vent hose from the tank, insert the CoolFule™ adapter between the vent hose and the tank, clamp down and run your return like to it. That's it!
This compact simple looking device consists of some very special features. The High flow compact "Tee" is made from 304 Stainless Steel ensuring that is will never rust or corrode. The fittings are high quality brass for corrosion prevention as well as a solid, secure fluid-tight seal.
The return inlet has a unique built in baffle and flow redirector to prevent the return fuel from entering into the vent tube and spraying up out of the filler cap. Something especially beneficial when the engine is running and you open the gas cap. This also prevents fuel foaming and aeration inside the tank since it directs the fuel directly down into the tank rather than right near the pickup tube like most other returns. This unique flow redirector also allows full unrestricted venting to the filler neck when refueling.
* SPF Mk3 kit comes with a high quality premium Gates fuel rated 5/8" vent hose to couple the adapter to the tank, and all of the necessary high quality premium HD Stainless Steel hose clamps.
* Completely assembled and ready to install!
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Inside, the diverter valve is ported to return fuel directly into the tank, yet still allow unrestricted venting from the tank to the filler cap
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This unique diverter valve routes return fuel directly to its destination
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CoolFule™ Fuel Return Line Tank Adapter - w/3/8 NPT Threaded Return
For Nipple or AN fitting - Does not come with return fitting - please select below...
Both 5/8" vent fittings and diverter valve
pre-installed to the correct depth and sealed
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($139 value)
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ADD return fitting - Installed
Choose from 1/4", 5/16", 3/8" and 1/2" Nipple
Installed, sealed and seated to the correct depth
(3/8" being the most popular)
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or...
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ADD return fitting - Installed
Choose from 6AN, 8AN or 10AN male fitting
Installed, sealed and seated to the correct depth
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The 3/8" NPT inlet accepts various sized hose nipples and AN fittings. This is the base version without any additional options added on.
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ADD vent hose - "SPF Mk3 Kit"
Includes 5/8" fuel hose from adapter to tank pre-cut to the correct length and all necessary S.S. hose clamps
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(optional fully polished version shown with optional inlet fitting installed and "SPF" vent hose kit)
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Original OEM fuel filler hose and vent hose
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Cool Fule™ Return Line Tank Adapter installed
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