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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 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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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
4.7 ★★★★★
Based on 1155 reviews
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ChilledOut
Louisville, US
★★★★★ 1
Fuzzballs get wearing once
Color: Black, Size: X-Large
Very smart to wear, but the quality is terrible so after one wash the collar start fraying and fuzzballs start forming. Very disappointing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
M
Verified Purchase
Me. Myself, and I.
Natrona Heights, US
★★★★★ 5
Nice shirt.
Color: Black, Size: XX-Large
Good neck height, not too high, firm neck grip without the choke feel. Clean look when wearing under an open shirt or looks good alone, Soft feel against the skin, and it washes well, no pulling or color fade. semi-form-fitting on the body, but not tight for the size. priced well.
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Reviewed in the United States on May 25, 2026
G
Verified Purchase
Garrett
Lexington, US
★★★★★ 5
T-Shirts
T-Shirts are very nice. They run small. Order 1 size up
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Reviewed in the United States on December 31, 2025
A
Verified Purchase
Amazon Customer
Grantham, US
★★★★★ 3
Mock turtle neck sagged and did not fit well.
Shirt is well made. Collar not so much. Sagged and did not fit well. Donated to Goodwill.
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Reviewed in the United States on April 29, 2026
R
Verified Purchase
Richard T. Russell
Massapequa, US
★★★★★ 5
A Difficult to Find T-Shirt
These T-Shirts are nice. A super difficult to find. The manufacturer calls it a mock-turtle neck (MTN). But the collar height is actually a bit shorter than the traditional MTN, which is great. It's closer to a regular T-Shirt that comes all the way to the neckline. And very somt a comfortable. This is the perfect style of T-Shirt to wear under a sportscoat, if desired. Or under a shirt where you want the T-Shirt to show for contrast. Just the right look.
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Reviewed in the United States on February 17, 2026

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