Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade

Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade

Marsoni

M251S

$90.95

Get it in 3 business days with 1 day shipping. Friday, May 29

Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve UpgradeSKU: MMTC JK TBVFF UPC: 840197706091 Mishimoto Mopar Pentastar Hemi Thermal Bypass Valve Upgrade Replace the stock thermostatic bypass valve in your 2012 2018 Jeep Wrangler JK and compatible Mopar vehicles with Pentastar or Hemi engines using this Mishimoto full flow upgrade. It delivers transmission fluid to the cooler from startup eliminating flow restrictions and thermostat failures that cause overheating. Perfect for trail driving towing or hot

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Your Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade orders ship within 1-2 business days.

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Fast: 2-3 business days
Express: 1-2 business days

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This stuff works. I added it to my four 5 gallon gas cans before filling them up. I’ve used 10 gallons of gas in my lawn tractor so far and can tell it likes it. I do annual maintenance before summer and check or change the spark plug so it performs the best it can. I have 508 hours on it and with this it seems like it idols smoother, which indicates it has helped in the carburetor since I haven’t had to remove it and clean it. Works great.

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Reviewed in the United States on April 30, 2026

Verified Purchase

Dennis

Los Angeles, US

★★★★★ 5

Great product

Size: 4 Fl Oz (Pack of 1)

Used this stabil in my rider after first start of the season. Machine running rough and uneven. Drained old fuel and added it. Within 15 minutes at full throttle it began to run normal. No back fires and engine back to normal. There will always be a bottle of this in my garage.

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Reviewed in the United States on May 13, 2026

Verified Purchase

Snowbutch1

Alexandria, US

★★★★★ 5

Works Great

Size: 8 Fl Oz (Pack of 1)

I"ve used Stabil gas treaments for year but never this particular type. With gas the way it is, I decided to see how it might help my mower and also my older truck. My older push mower which admittedly doesn't get pampered and petted seems to love it. Either it's grateful to get anything special or this stuff really has helped. The first tank seemed a little smoother but by the second I could hear the difference and feel it with the smoother sound and seems more power. It's easy to mix and use and Stabil is a well known reputable company.

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Reviewed in the United States on April 24, 2026

Verified Purchase

christy

Carnegie, US

★★★★★ 5

It works!!!!

Size: 2 fl oz

This stuff works!!!!!

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Reviewed in the United States on May 29, 2026