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Best Automotive Performance Engine Fan Spacers

Flex-a-lite 14556 Mill Finish 2" Fan Spacer Kit
The Flex-a-lite fan spacer kit is best when used with Flex-a-lite belt fan. 2" thick for proper spacing when attaching fan.
Reviews
"Bolts had the wrong thread size."
"It was the prefect size spacer."
"Not too big, Just what I needed for clearance."
"I put this on my '69 Camaro."
"Works like a charm with the Pulley Adapter."
"Sent me a 1 inch not a 2 inch I can not do anything with a 1 inch spacer🤔."
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Allstar Performance ALL30192 Fan Spacer Kit
Aluminum spacers include reducer bushing, four Allen bolts to secure spacer to water pump and four hex bolts with washers to secure fan to spacer. Four Allen Bolts To Secure Spacer To Water Pump And Four Hex Bolts With Washers To Secure Fan To Spacer.
Reviews
"However, be advised that if you are using the spacer with a fan clutch, the Allen bolts are probably not usable, certainly in my application they were not, as there was no room between the spacer and clutch for an Allen wretch to fit in. Since I was not the most knowledgeable person on bolts before this, and not seeing this problem until in my hands, I lost a lot of time learning about bolts (As no information was given as to the size, thread and grade of the bolts supplied) and running to 5 different Automotive stores before be able to find four bolts from two different stores to replace these (Last set of two at each store)."
"Did not fit the application we had on our truck but it is not the device's fault as it is specifically made for a different type of fan clutch assembly than the one we have."
"Good quality, but not applicable to an S10 blazer/jimmy/bravada 4.3L v6 vortec."
"Nice spacer that looks good and functions properly."
"Does not sbc water pumps using the wider volt pattern."
"This spacer was a little pricey but it is high quality and looks great as well."
"Excellent quality nicely machined piece way better than those junky aluminum ones commonly found at the parts stores."
"This spacer will not fit GM water pump flange."
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Flex-a-lite 14548 Mill Finish 1" Fan Spacer Kit
The Flex-a-lite fan spacer kit is best when used with Flex-a-lite belt fan. 1" thick for proper spacing when attaching fan.
Reviews
"It says to install the adapter and then the spacer then the fan. The bolts with the spacer are the exact length for the installation so I attached the fan, spacer, and bolts to the adapter and torqued the bolts per the manufacturer."
"Works great to place the fan where I need it."
"It however did not fit my 1977 f350 that it was bought for and Amazon said would fit."
"not needed for flex-a-lite nylon fan for Jeep 4.0 install...as they stated on web site."
"Got the fan closer to the radiator and it is running cooler."
"The spacing was correct which allowed me to get away from a fan clutch and use a flex fan."
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Best Automotive Performance Engine Fans

Flex-a-lite 282 '00-'04 Chevy Truck Fan (for 34" cores only)
Up to 17 additional horsepower is transferred to the wheels by removing the mechanical fan, resulting in a gain of as much as 3 mpg in fuel economy. Enter your model number to make sure this fits.
Reviews
"First, most GM trucks made from 2000-'04 were equipped with 105 amp alternators- this is NOT big enough - trust me! You must hook up the A/C wire so the fans come on and keep the condenser cool, otherwise you risk damage to your A/C system, and at the very least no cooling until the engine warms up and the fans kick in."
"Thick well made fans and shroud for them fits like it say."
"It does not fit the largest radiator that GM used for 2500HD vehicles."
"I will know how it cools when we travel to the southwest in August. towing a 8500# travel trailer with a/c on."
"Custom fit."
"Works great, not difficult to install."
"A/C cooling is improved at low speed/idle and gas milage is up about 1mpg."
"Had I truly known I would have done this years ago."
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Best Automotive Performance Engine Fan Kits

Flex-a-lite 398 Syclone Black 16" S-Blade Reversible Electric Fan
If used as a primary fan, it frees up horsepower that would otherwise have to be used to turn a belt-driven fan. Increases horsepower while extending water pump life (when used to replace belt fan).
Reviews
"I needed a slim fan for my 1966 Mustang fastback. The whole car has been modified or customized in some way so I ended up with very little room between the radiator and the WP pulley."
"It's not loud at all but then again I don't hear much over the engine but I did test it before I installed it and a rubber glove stays well inflated on the other side of the radiator."
"Put the Strong 16 inch SYCLONE on the fan shroud (used clear silicone to seal edges) it actually turns the pusher blades (has enough CFM for me) prior to power on."
"Fan moves a ton of air and isn't super loud."
"Absolutely fantastic fan for the price."
"The box was really trashed when I received it."
"This would have been a good fan but I put it in my truck and it kept over heating I had two electronic fans on my f100 still over heated now I went back to the original belt driven fan and one electric fan now runs cold all the time."
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Best Automotive Performance Engine Fan Flexes

Flex-a-lite 1316 Blue Star Stainless Steel 6-Blade 16" Flex Fan
Fan edges are sharp; be sure and use gloves when working with the flex fan for added safety. Low engine drag at high rpms for better performance.
Reviews
"Pulls more air than the electric that was advertised at 3000 cfm."
"EASY TO INSTALL WITH RARIATOR OUT..SEEMS TO WORK FINE.."
"Perfect fit and a great improvement from the 4 blade tractor type fan!"
"This is the perfect fit fan for my modified 68 mustang."
"Light weight , fit perfectly for application , looks very good , works great and at a great price ."
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Best Automotive Performance Engine Fan Clutches

Behr Hella Service Premium Visco Fan Clutch BMW Applications
With more than 1000 quality parts,Behr Hella Service offers a wide range for European cars and Heavy Duty Trucks. Quality tested to ensure trouble-free installation and performance.
Reviews
"Heard nasty stories from other that bought the cheap chinese visco clutches, so opted to not skimp and go with quality."
"Installation was same as OEM, best method is to try and spin it to the left until it threads on with fan shroud slightly "up" out of installed spot."
"Super quiet fan clutch, not compared to those other overseas made products."
"Perfect fit and no issues with installation."
"I bought some other brands (much cheaper than Behr) from Amazon but ended up returning them all due to they were too loud."
"Fan clutch came packaged carefully and great price for a Behr clutch installed with no problem and unlike cheaper fan clutches makes zero noise."
"It's very quiet which was a concern and I think the old unit was dragging and causing the engine to lug."
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Best Automotive Performance Engine Fan Electric Controls

Flex-a-lite 31163 Variable Speed Control Module with Threaded Temperature Sensor
As the temperature rises about 10 degrees, the controller gradually increases fan speeds up to 100 per cent. Senses coolant temperature and sets fan speed 60-100 percent for better cooling control.
Reviews
"Update 10/30/2017: I have lowered the star rating because the speedo bounce is still happening and Flex-a-Lite seems unwilling to help solve this. They call for a 12v source but in reality the controller connection needs to be grounded through the switch as it outputs a 12v signal."
"The soft start and variable speed are clutch for aftermarket efan installs. On a side note, the 30sec run time after shutdown bothers me and you can not turn it off."
"I called the tech line at Flex-a-lite before I bought it,and told them them I had a Derale two speed fan and wanted to know if it would work on it properly. (Note: Derale controler I bought was junk, did not work out box and tech support does not exist.)."
"So far this controller works flawlessly."
"It starts at 60% Fan speed which increases to 100% in the next 10 Degrees F. I used to have the Standard Temperature Probe which came with the Fan - It is pushed into the Radiator Fins."
"Good instructions, good parts, flexible control options make for a nice product."
"Put on my 66 f100 4x4 that was plagued with low speed over heating issues."
"I have had other sensors that went thru the radiator fins and they were not that reliable and accurate."
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