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Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade
Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade
Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade
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Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade

Marsoni M251S
Sale price$90.95
Pay 4 payments of $22.74 a month.Shop Pay
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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  • 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
4.6 ★★★★★
Based on 839 reviews
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M
Verified Purchase
M. Chulick
San Leandro, US
★★★★★ 4
Delivered quickly
Size: 16 Fl Oz (Pack of 1), Style: Individual
Just trying to keep my small engines running with this awful California fuel
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 4, 2025
S
Verified Purchase
Shopper scott
Massapequa, US
★★★★★ 5
Good buy
Fit great. I have a toro 7.25 Brigs & Stratton 21 icnh rececyler. Mower started up great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
R
Verified Purchase
Robert Edwards
Lake Worth, US
★★★★★ 5
Good Product
Works great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
M
Verified Purchase
MARC FOSTER
Grantham, US
★★★★★ 5
Worked perfectly
Excellent product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
K
Verified Purchase
KT
Draper, US
★★★★★ 4
Check the gap!
Plugs work great. I will say for those reviews saying they got a dud. CHECK THE GAP!!! Both plugs were not at 0.030 as advertised. I gapped the plug and it worked perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026

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