SKU: 57201413516

Robertshaw 333 Series hi flow balanced sleeve thermostat

Sale price$35.96 Regular price$39.95
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Description

Robertshaw 333 Series hi flow balanced sleeve thermostatThe Robertshaw 333 series thermostat has the distinction of being the only available thermostat that would accommodate the 351 Cleveland Controlled bypass system*. A 351C provided greater water flow in the engine for a faster, more even warm up without creating hot spots (particularly in the valve area). The bypass design controlled the water flow and temperature with less cycling and increased the flow to the radiator for improved cooling

The Robertshaw 333 series thermostat has the distinction of being the only available thermostat that would accommodate the 351 Cleveland Controlled bypass system*.  A 351C provided greater water flow in the engine for a faster, more even warm-up without creating hot spots (particularly in the valve area). The bypass design controlled the water flow and temperature with less cycling and increased the flow to the radiator for improved cooling performance.   It was an ideal solution for overheating 351C found in mustangs and hot Panteras. 

The OE Robertshaw thermostats for the OE bypass is available again.  Its made in the USA.  Yes this is a real Robertshaw 333 series.  If you want 160 degree alternative, consider the 333-substitute

The substitute performs the same preheat function but we resized the bypass hole for more temperature options.  

*The 400 and 351M had this feature cast into the block and did not utilize this brass bypass insert.  The cast bypass hole requires the 333 series.

Year Make Model Eng CID VIN
1978-1979 FORD BRONCO V8 351 H
1984 FORD BRONCO V8 351 H
1970-1971 FORD COBRA V8 351 M
1971 FORD COBRA V8 351 H
1970-1974 FORD COUNTRY SEDAN V8 351 H
1972-1974 FORD COUNTRY SEDAN V8 400 S
1970-1974 FORD COUNTRY SQUIRE V8 351 H
1979 FORD COUNTRY SQUIRE V8 351 H
1972-1974 FORD COUNTRY SQUIRE V8 400 S
1975-1976 FORD COUNTRY SQUIRE V8 400 S
1970-1972 FORD CUSTOM V8 351 H
1972 FORD CUSTOM V8 400 S
1970-1974 FORD CUSTOM 500 V8 351 H
1976-1977 FORD CUSTOM 500 V8 351 H
1972-1974 FORD CUSTOM 500 V8 400 S
1975-1977 FORD CUSTOM 500 V8 400 S
1976-1979 FORD E-100 ECONOLINE V8 351 H
1976-1979 FORD E-150 ECONOLINE V8 351 H
1980-1984 FORD E-150 ECONOLINE V8 351 G
1976-1979 FORD E-250 ECONOLINE V8 351 H
1980-1984 FORD E-250 ECONOLINE V8 351 G
1984 FORD E-250 ECONOLINE V8 351 H
1981 FORD E-250 ECONOLINE V8 400 Z
1976-1979 FORD E-350 ECONOLINE V8 351 H
1980-1984 FORD E-350 ECONOLINE V8 351 G
1981-1982 FORD E-350 ECONOLINE V8 400 Z
1977-1979 FORD F-100 PICKUP V8 351 H
1981 FORD F-100 PICKUP V8 351 G
1978-1979 FORD F-100 PICKUP V8 400 S
1977-1978 FORD F-150 PICKUP V8 351 H
1978-1979 FORD F-150 PICKUP V8 400 S
1979 FORD F-150 PICKUP V8 351 H
1981-1984 FORD F-150 PICKUP V8 351 G
1984 FORD F-150 PICKUP V8 351 H
1977-1979 FORD F-250 PICKUP V8 351 H
1980-1984 FORD F-250 PICKUP V8 351 G
1984 FORD F-250 PICKUP V8 351 H
1978-1979 FORD F-250 PICKUP V8 400 S
1981-1982 FORD F-250 PICKUP V8 400 Z
1978-1979 FORD F-350 PICKUP V8 351 H
1980-1984 FORD F-350 PICKUP V8 351 G
1978-1979 FORD F-350 PICKUP V8 400 S
1980-1982 FORD F-350 PICKUP V8 400 Z
1970 FORD FAIRLANE V8 351 H
1970 FORD FAIRLANE V8 351 M
1970 FORD FALCON V8 351 M
1971-1974 FORD GALAXIE 500 V8 351 H
1972-1974 FORD GALAXIE 500 V8 400 S
1972-1974 FORD GRAN TORINO V8 351 H
1976 FORD GRAN TORINO V8 351 H
1972-1974 FORD GRAN TORINO V8 351 Q
1972-1974 FORD GRAN TORINO V8 400 S
1975-1976 FORD GRAN TORINO V8 400 S
1976-1977 FORD GRANADA V8 351 H
1970-1974 FORD LTD V8 351 H
1976-1979 FORD LTD V8 351 H
1972-1974 FORD LTD V8 400 S
1975-1978 FORD LTD V8 400 S
1978-1979 FORD LTD II V8 351 H
1977-1978 FORD LTD II V8 400 S
1971-1973 FORD MUSTANG V8 351 H
1970-1971 FORD MUSTANG V8 351 M
1972-1973 FORD MUSTANG V8 351 Q
1970-1974 FORD RANCH WAGON V8 351 H
1972-1974 FORD RANCH WAGON V8 400 S
1975-1976 FORD RANCH WAGON V8 400 S
1970-1974 FORD RANCHERO V8 351 H
1976-1979 FORD RANCHERO V8 351 H
1970-1971 FORD RANCHERO V8 351 M
1972-1974 FORD RANCHERO V8 351 Q
1973-1974 FORD RANCHERO V8 400 S
1975-1978 FORD RANCHERO V8 400 S
1978-1979 FORD THUNDERBIRD V8 351 H
1977-1978 FORD THUNDERBIRD V8 400 S
1970-1974 FORD TORINO V8 351 H
1976 FORD TORINO V8 351 H
1970-1971 FORD TORINO V8 351 M
1972-1974 FORD TORINO V8 351 Q
1973-1974 FORD TORINO V8 400 S
1975-1976 FORD TORINO V8 400 S
1978-1979 LINCOLN CONTINENTAL V8 400 S
1978-1979 LINCOLN MARK V V8 400 S
1971-1973 MERCURY COLONY PARK V8 351 H
1979 MERCURY COLONY PARK V8 351 H
1972-1976 MERCURY COLONY PARK V8 400 S
1971-1974 MERCURY COUGAR V8 351 H
1975-1979 MERCURY COUGAR V8 351 H
1970-1971 MERCURY COUGAR V8 351 M
1972-1974 MERCURY COUGAR V8 351 Q
1974-1978 MERCURY COUGAR V8 400 S
1971 MERCURY CYCLONE V8 351 H
1970-1971 MERCURY CYCLONE V8 351 M
1979 MERCURY GRAND MARQUIS V8 351 H
1976-1978 MERCURY GRAND MARQUIS V8 400 S
1972-1973 MERCURY MARQUIS V8 351 H
1978-1979 MERCURY MARQUIS V8 351 H
1972-1978 MERCURY MARQUIS V8 400 S
1976-1977 MERCURY MONARCH V8 351 H
1971-1974 MERCURY MONTEGO V8 351 H
1975-1976 MERCURY MONTEGO V8 351 H
1970-1971 MERCURY MONTEGO V8 351 M
1972-1974 MERCURY MONTEGO V8 351 Q
1973-1976 MERCURY MONTEGO V8 400 S
1971-1973 MERCURY MONTEREY V8 351 H
1972-1974 MERCURY MONTEREY V8 400 S
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SKU: 57201413516

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Todd25
Alexandria, US
★★★★★ 5
Great option!
Color: Grey, Size: M-17.7 X 13.8 Inch
Used for the very first time over the weekend - was more than comfortable and compact enough to fit into my multi-day teton pack..
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Reviewed in the United States on April 28, 2026
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anon
Omaha, US
★★★★★ 4
Good pillow, useless case
Color: Grey, Size: S-16 X 12 Inch
Nice pillow, small and portable. No horrible smell. Negative 1 star for the carrying case which is twice the size of the pillow. If you think you will use it to compress your pillow for travel, think again. It just expands back in the bag. Totally useless unless you’d like to store rocks in the bag instead.
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Reviewed in the United States on March 3, 2026
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ltrantech
West Palm Beach, US
★★★★★ 5
Great for car naps and family road trips.
Color: Grey, Size: S-16 X 12 Inch, Color: Grey, Size: S-16 X 12 Inch
Adjusts to any position, no weird smell, packs well and hangs from headrest. Soft, supportive, and easy to clean after kid messes. Slightly bulkier than some, but the comfort is worth it!
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Reviewed in the United States on February 12, 2026
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Nancy Sullivan
Alexandria, US
★★★★★ 5
Love size. And it’s comfortable
Color: Apricot Pink, Size: M-17.7 X 13.8 Inch
This travel pillow is firm but yet soft I was impressed with it and I love the size.
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Reviewed in the United States on April 22, 2026
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Emily
Pawtucket, US
★★★★★ 5
A Travel Pillow That Actually Works!
Color: Sky Blue, Size: M-17.7 X 13.8 Inch
I fly fairly often and have gone through a few different pillows that I thought would be great but left me disappointed! I’m honestly so happy with this pillow. It fits easily in my backpack, and it doesn’t look ridiculous if I hanging it on my backpack if I’m packing a lot. It’s thick enough to support my head against the window/wall without feeling too bulky. I usually sleep really poorly on planes, and I’m not going to say that this was the magic charm, but I definitely slept more comfortably. It’s also great support against your lower back if you’re not sleeping. Some have mentioned a smell, but honestly it just smells like memory foam usually does and it’s not overpowering. I’ve only used for a few flights so far but I love it!
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Reviewed in the United States on January 22, 2026

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