SKU: 70713346649

Improved Racing Thermostat kit

Sale price$989.55 Regular price$1099.50
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Improved Racing Thermostat kitWe recommend using this kit together with our oil cooler kit if you are a daily driver. A thermostat helps getting your transmission up to optimal temp quickly, and keeps it there. The only thermostat with a patented design that closes 100% when you need it to. With a correct sized oil cooler kit, you with have full temperature control on your transmission. The termostat opens up about 10c lower than most OEM thermostats, giving you better control of

We recommend using this kit together with our oil cooler kit if you are a daily driver.

A thermostat helps getting your transmission up to optimal temp quickly, and keeps it there.

The only thermostat with a patented design that closes 100% when you need it to.

With a correct sized oil cooler kit, you with have full temperature control on your transmission.

The termostat opens up about 10c lower than most OEM thermostats, giving you better control of your transmission temps.

The typical stabilization temp is 74C (165F)

Activation temp is 71C (160F)

Full flow temp is 83C (181F)

 Please add ptfe hose ends for a complete install with our oil cooler kits.

Improved Racing's Flow Series Compact (FSC) oil thermostat is an ultra-compact unit designed for use in cooling systems for transmissions, differentials, transaxles and small engines where flow rates do not exceed 5 GPM. This thermostat is perfect for engine oil cooling in motorcycles, ATVs, go karts, and other small engines.

The device's unique, patented internal design (US patent 9,772,632) ensures a low pressure drop by placing the bypass valve mechanism completely out of the primary oil flow. This arrangement also allows for a compact design.

Without a thermostat, oil and transmission fluid coolers are likely to over-cool the fluid, delaying engine warm-up and resulting in horsepower loss, excessive engine wear and reduced gas mileage. Oil thermostats perform the critical function of bypassing the cooler until the oil has reached its minimum operating temperature.

The thermostat maintains the oil exiting the engine at the rated minimum temperature in most conditions

 

  • Reduces excessive engine wear and horsepower losses while improving gas mileage by preventing oil temperatures from dropping below optimal levels
  • Patented, high flow, low pressure drop design locates the valve assembly completely out of the primary fluid flow
  • Maintains a minimum fluid temperature according to the typical stabilization temp in the table below, +/- 2°F (+/- 1°C)
  • Allows a small percentage (less than 10%) of fluid to continually circulate through the cooler to eliminate air pockets and prevent cold fluid trapped in the cooler from shocking the system
  • Rebuildable
  • 6061-T6 billet aluminum construction with black MIL-A-8625 Type II anodized finish
  • Lightweight at just 7.5 ounces (212g) without brackets or fittings

 

 

Note
This item can be backordered.

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: 70713346649

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 526 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
N
Verified Purchase
NJames
Belleville, US
★★★★★ 4
Wash before wearing — the dye will run
Size: Small, Color: Royal Blue
Make sure you wash this shirt before wearing. Maybe even two washes. The color WILL run and dye your skin. (I was impatient and wore it before washing and ended up with a blue torso) Otherwise, it fits well. I’d put it as a regular fit rather than a slim fit. Very soft, albeit synthetic, material.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
M
Verified Purchase
Mara
Lake Worth, US
★★★★★ 5
Black
Size: Medium, Color: Black
Fit well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
P
Verified Purchase
Peter Dooley
Lake Worth, US
★★★★★ 3
Good Fit but too long
Size: Medium, Color: Army Green
I would give these shirts a 5 star rating if they weren’t so long over the waist, even a medium sized it doesn’t matter way too long
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
S
Verified Purchase
SkipDesign
San Leandro, US
★★★★★ 5
A T-shirt chic? YES!!
Size: X-Large, Color: Wine Red
This is the second one of these shirts I’ve ordered. I don’t wear ties anymore, so I actually wear this mock turtle neck under a blazer, or a sports coat as my father used to call them. I wore a blue one the other evening and I wore it underneath a plaid blazer. Whoever would guess a T-shirt could be quite so chic. It stretches plenty, it’s light and it’s so comfortable. I have two of them now and I’m deciding on a third one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
H
Verified Purchase
Holliday
West Palm Beach, US
★★★★★ 5
Light and Warm
Size: XX-Large, Color: Royal Blue
Quite comfortable (with a little tape over the label on the inside left) perfect light weight shirt for 40°-50°.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026

recommand products