Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit

Marsoni

M251S

$154.24

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

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve KitThe Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in

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Fit & Quality: Everything fit perfectly on my Eufy Omni S1 Pro — the rollers snapped right in, and the filters matched the originals exactly. You can tell these are genuine Eufy parts, not knockoffs. Performance: After swapping the brushes and mop roller, my vacuum immediately started cleaning better again. Suction improved, and it picked up fine dust I hadn’t noticed before. Ease of Use: Installation took less than ten minutes. Everything comes sealed and labeled clearly, which makes it simple to replace parts without guessing. Value: It’s a little pricey compared to third-party kits, but the quality and compatibility are worth the extra few bucks. Verdict: Solid replacement set that restores performance to like-new.

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Reviewed in the United States on November 2, 2025

Verified Purchase

Tom Mulé

Pawtucket, US

★★★★★ 5

Great aftermarket substitute items

Great quality and fit

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Reviewed in the United States on December 16, 2024

Verified Purchase

Guy Charles