Thermostat - High Flow Thermostat
MRD100
Spec-R Thermostat
Spec-R️ thermostats are the perfect thermostat for high performance and racing applications. Designed and manufactured by a leading OE thermostat supplier to withstand high pressure and high horsepower demands. Keep your vehicle running at maximum cooling efficiency, whether on the track or on the street.
Features:
- Black oxide coating for high temperature tolerance, corrosion resistance and life-long durability
- Lower than OE opening temperature for cooler engine operation, resulting in more power
- Specially formulated Spec-R️ heat element mixture for faster response time
- Proprietary gasket composition to withstand high pressure / high performance cooling systems
Specifications:
- Prop 65: WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
- Jiggle Pin Weep Hole: Yes
- Height: 1.48 in
- Height: 37.59 mm
- Gasket Or Seal Included: No
- Grade Type: OEM
- Type: Standard
- Gasket Quantity: 0
- Material: Stainless Steel
- Material: Copper
- Color: Silver
- Color: Brass
- Sealing Flange Outside Diameter: 2.13 in
- Sealing Flange Outside Diameter: 54.10 mm
- Gasket Or Seal Required: Yes
- MAP Controlled: No
- Gasket or Seal Pre-Installed: No
- Jiggle Pin Check Valve Quantity: 1
- Bypass Flange Length: 0.00 mm
- Bypass Flange Length: 0.00 in
- Bypass Flange Diameter: 0.00 mm
- Bypass Flange Diameter: 0.00 in
- Height Between Flanges: 0.79 in
- Height Between Flanges: 20.07 mm
- Design: Standard
- Start to Open Temperature: 160.0 Deg. F
- Start to Open Temperature: 71.11 Deg. C
- Seal Material: N/A
- Installation Tool Included: No
- Bolt Hole Quantity: 0
- Electric: No
- Engine Coolant Thermostat Quantity: 1
- Includes Jiggle Pin Check Valve: Yes
- Seal Quantity: 0
- Flange Thickness: 0.06 in
- Flange Thickness: 1.52 mm
Interchanges:
- Cartek MRD100
- MotoRad MRD100
- NAPA MRD100
Applications:

Need help finding the right product?
Our dedicated team is here to steer you in the right direction. Click below and let us know how we can assist you in finding the ideal product for your need. Your journey to experiencing BETTER starts here.
Looking for custom development?
We’re not just about products; we’re about crafting tailored solutions that match your needs. Are you ready to bring your new project to life? Click below, and let’s embark on the journey of custom product development together.






