Featured Products

Titan Motorsports Toyota Supra MKV A90 / A91 Ultimate rear Multilink drag suspension bundle by SPL Parts
Titan Motorsports Toyota Supra MKV A90 / A91 Ultimate rear Multilink drag suspension bundle by SPL Parts

from $1,549.00

CSF 2020+ Toyota Supra MKV A90 A91 High Performance heat exchanger
CSF 2020+ Toyota Supra MKV A90 A91 High Performance heat exchanger

$699.00

Verus Engineering Anti-Buffeting Wind Deflector for 2020+ Toyota Supra MKV A90 / A91
Verus Engineering Anti-Buffeting Wind Deflector for 2020+ Toyota Supra MKV A90 / A91

$203.45

HKS Hipermax Touring Height Adjustable Springs A90 MKV Supra 2020+ - 80280-AT001
HKS Hipermax Touring Height Adjustable Springs A90 MKV Supra 2020+ - 80280-AT001

$1,000.00

TITAN MOTORSPORTS 996 / 997 PORSCHE ROLL BAR (HARNESS BAR)
TITAN MOTORSPORTS 996 / 997 PORSCHE ROLL BAR (HARNESS BAR)

from $1,795.00

TE37SL Titanium Gunmetal in A90 Spec
TE37SL Titanium Gunmetal in A90 Spec

$3,400.00

AMS Performance MKV Supra Anti-Wind Buffeting Kit - Matte Carbon
AMS Performance MKV Supra Anti-Wind Buffeting Kit - Matte Carbon

$199.95

Titan Motorsports 2020+ Toyota MKV A90 A91 Supra Full Titanium Valved Exhaust System
Sale
Titan Motorsports 2020+ Toyota MKV A90 A91 Supra Full Titanium Valved Exhaust System

$2,499.00 $1,899.00

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

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

$160.81 $144.18
Snap Logo Lease for as low as $/week Learn More
More Financing Options

Mishimoto

MISMMTC-L5P-TBV

turn-14-distribution-api Call or message for availability

-
+

Details

The 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-line thermal bypass valve that controls fluid flow to the transmission cooler. The purpose of this valve is to prevent transmission fluid from flowing to the cooler until it reaches operating temperature. The thermostat inside this valve is prone to failure, however, and when that happens, the fluid never flows to the cooler, and the transmission can overheat. That's why Mishimoto has developed a thermal bypass valve upgrade for your 2017+ Chevrolet/GMC 6.6L Duramax. Our CNC-machined aluminum thermal bypass valve not only looks better than the stock unit, but it performs better too. This Mishimoto thermal bypass valve kit includes a fully serviceable thermostat for fast warm-up in cold climates. This kit also includes a thermostat bypass that can be installed to provide constant cooling in warm climates or for use in extreme driving/towing conditions. The Mishimoto thermal bypass valve features strategically machined internal passages, providing improved flow over the stock valve for more effective cooling. In addition, cooling fins machined into the valve body add even more heat dissipation. This 2017+ Chevrolet/GMC 6.6L Duramax L5P Thermal Bypass Valve Kit is built to last a lifetime with a durable black anodized finish and our Mishimoto Lifetime Warranty.

This Part Fits:

Year Make Model Submodel
2021 Chevrolet Silverado 2500 HD Custom
2017-2021 Chevrolet Silverado 2500 HD High Country
2017-2021 Chevrolet Silverado 2500 HD LT
2017-2021 Chevrolet Silverado 2500 HD LTZ
2017-2021 Chevrolet Silverado 2500 HD WT
2017-2021 Chevrolet Silverado 3500 HD High Country
2017-2021 Chevrolet Silverado 3500 HD LT
2017-2021 Chevrolet Silverado 3500 HD LTZ
2017-2021 Chevrolet Silverado 3500 HD WT
2020-2021 GMC Sierra 2500 HD AT4
2017-2021 GMC Sierra 2500 HD Base
2017-2021 GMC Sierra 2500 HD Denali
2017-2021 GMC Sierra 2500 HD SLE
2017-2021 GMC Sierra 2500 HD SLT
2020-2021 GMC Sierra 3500 HD AT4
2017-2021 GMC Sierra 3500 HD Base
2017-2021 GMC Sierra 3500 HD Denali
2017-2021 GMC Sierra 3500 HD SLE
2017-2021 GMC Sierra 3500 HD SLT

Shipping & Returns

Returns Policy

--PLEASE NOTE: MOST ORDERS ARE SUBJECT TO RESTOCK OR CANCELATION FEE. PLEASE CALL OUR OFFICE FOR DETAILS AND EXCEPTIONS-- You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Financing Options Available - Click Here for Details

Loading...
Error
 

is added to your shopping cart.

is added to your wish list.

Close