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got your 4 inch SS exhaust put on my 97 K3500 recently. Big difference! Turbo spools up a lot quicker and the engine doesn't seem to work near as hard pulling around this 7100 pound (empty) crew cab pickup. This makes 2 6.5TD's I own. With Walt around to...
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From: Hud
I wish the rest of the vehicle serice world was as committed as Walt is. Great guy to talk to, great products and service. Take it from me, ain't nobody doing it better than these folks!
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From: Tony S.
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6.5TD C/K Trucks  >  Cooling System Upgrades & Components  >  SEVERE DUTY Fan Upgrade (late)

SEVERE DUTY 6.5 Fan Upgrade for C/K trucks, G vans and subs 99-1/2 using the screw-on flange

SEVERE DUTY Fan Upgrade (late)

SEVERE DUTY Fan Upgrade (late)

Model: ssd-3668 $686.62
United States and Canada - All Deliveries to the United States and Canada will be made by UPS. You will be quoted the shipping cost and presented with delivery options at the time of checkout. See our shipping calculator for more information.
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NOTICE:
This item does not qualify for the free shipping promotion on orders over $200.00
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NEW SEVERE DUTY Fan Upgrade for 99-1/2 + 6.5l C/K trucks, G Vans, Subs, Tahoes using the screw-on flange.

This is a DIRECT FIT 20" FAN, NO CUTTING OR GRINDING OF SHROUD IS REQUIRED! Includes our special modified low temp clutch ssd-9405 which is calibrated to engage 15DF lower then your stock clutch.

The pitch of this fan is the most agressive I have ever seen and will flow an enormous amount of air.

180 high flow thermostats are required for this fan to work at its best. Please check elsewhere in this category for the correct 180 t-stats for your application.

 

The air temperature coming through the radiator is sensed by the bi-metal thermal spring on the front of the thermal fan clutch. It expands and contracts with the change in air temperature operating a valve inside of the clutch. When cold, the silicone drive fluid is pumped from the working area to the reservoir. When hot, the valve opens allowing fluid from the reservoir to be transferred to the working area thereby increasing the fan speed. The clutch disengages as the air temperature decreases, closing the valve and allowing the silicone fluid to be pumped back into the reservoir.

 

A thermal fan clutch is engaged on a cold startup because the fluid drains into the working area when the engine is shut off. The fan clutch will slow down shortly after startup as a result of a pumping action produced by a difference in speed between the shaft and the body of the clutch.

Our Special Clutches are specifically designed to engage at lower temperatures than the original equipment parts that they replace.

Note: For use only on the vehicles and applications listed above. Use on any other vehicle or application is at your own risk.

Special order, 1-2 weeks to ship.

SEVERE DUTY Fan Upgrade (late)

 

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