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

$99.95

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

Easy Shipping

Quick Dispatch:

Your Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit orders ship within 1-2 business days.

Delivery Options:

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

Order Tracking:

You'll receive a tracking link by email once your Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit ships.

Need Help?
Questions about Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit in your area.

Get Shipping Estimates

Country Zip/Postal Code

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

I bought these earrings a year ago and I've been wearing them ever since! I never take them off because they are so comfortable. They never come unlatched and they are very durable. They look great and I love how they have some movement because of the two loops hooked together. For me the size is perfect, but you can always remove the dangling hoop to decrease the weight and create a smaller look. Even with booth hoops installed, they are so light that I cannot feel them in my ears. They would make a lovely gift because they look more expensive than the price I paid.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on October 8, 2025

Verified Purchase

Alvee

Alexandria, US

★★★★★ 5

Good quality

Lovely earrings. A little smaller than I expected but Going to keep them. A reasonable purchase. Lightweight and clasp a little tight but better than loose.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on June 2, 2024

Verified Purchase

LaToyia Taylor

Dallas, US

★★★★★ 3

Cute but small

Color: Gold Paperclip

These are cute but they are smaller than I thought they would be. The only thing I did not like was that they kept coming apart. The two links would unhook and one hook would fall off. I squeezed them a little tighter and that helped.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on August 17, 2024

Verified Purchase

Carolanne

Dallas, US

★★★★★ 5

Nice fit

I love these. A good fit for every day use.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on December 28, 2025