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 UpgradeThe transmission in your Jeep Wrangler is the heart of its drivetrain. Whether you're hauling groceries or hitting the trail, it's vital to keep it performing at its best, and keeping the transmission fluid cool is crucial to that goal. In an attempt to balance drivability and the health of your transmission, Jeep fitted a thermostatic bypass valve to the lines that feed the transmission cooler. This valve ensures fluid doesn't flow through the cooler

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

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Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

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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

This product misinformed me of size. It’s 47.235” in length not 48” as advertised. This is just another means of manufacture cheating customers with false information. I did not return as I was just moving into home. I was also in a hurry to finish the installation since I bought three of these not knowing the truth. You can make your own choice but I needed 48” and paid for 48” and got shorted. I used the shipping box to make an template to install brackets that manufacture did not provide.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on October 4, 2025

Verified Purchase

Angela Salinas

San Leandro, US

★★★★★ 1

Terrible for the money

I purchased 2 sets…for the money I highly suggest going to an actual store to purchase…very low quality and looks horrible…I don’t want a replacement which was all that was offered…not happy

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Reviewed in the United States on February 16, 2026