SKU: 57201413516

Robertshaw 333 Series hi flow balanced sleeve thermostat

Sale price$35.96 Regular price$39.95
Save 10%

Pay in installments of $9.99 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 30 - Aug 4

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 57201413516

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 23 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
J. James
West Palm Beach, US
★★★★★ 5
Great blanket
Color: Grey, Size: King
Liteweight, cooling, and no stray strands. We've had it for over a month and no issues. Also very soft. Perfect summer blanket. Update: Still no picking issues. I appreciate that the fabric is light and does does not cause our washing machine to become unbalanced. So it still looks good and is great for hot sleepers.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
L
Verified Purchase
Lisa S.
Louisville, US
★★★★★ 5
Wonderful, non-snaggable blanket
Color: White, Size: Queen
NO cat snags at all! After reading the reviews, I had reservations about getting this because of some comments about cats possibly snagging the threads on this. I'm happy to report that my two rambunctious cats have not harmed a single thread after sleeping on it with me in over a month. It's the perfect weight, and very attractive. The quality is vastly superior to what you would expect for the price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
C
Verified Purchase
Civil Servant
Waukegan, US
★★★★★ 5
Great lightweight summer blanket
Color: White, Size: Queen
Love this waffle blanket. Soft, cool when used alone, warm used with another blanket. Good size. Purchased queen size and it's very generously sized. Only con is white is off white, but it works. I would buy this blanket again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
A
Verified Purchase
Alleged Lee
Natrona Heights, US
★★★★★ 4
Nice, lightweight blanket for cool rooms. Probably a bit light for a COLD room.
Color: Dark Grey, Size: Queen
This is a nice soft lightweight blanket. The only problem I have is they don't come in a "standard" mattress size, so you order something that may (does in my case) touch the floor. I'd have said they drag the floor, but that only happens when you move the bed around the room with the blanket in place. An unhandy way to clean the floor, so I don't recommend it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
W
Verified Purchase
Wendy Adkins
Belleville, US
★★★★★ 5
Incredible purchase
Color: White, Size: King
Beautiful and lightweight. Adds texture to any bedding. It is a warm ivory color.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026

recommand products