Thermostat Kit 3917324 3923331 for Cummins Engine 4B3.9 6B5.9 B5.9 ISB QSB5.9 QSB6.7

Shipping & Tracking
We have been committed to providing customers with fast, high quality logistics delivery services. Normally, we will deliver the parts within 1-3 days after receive your orde. And fullfill the tracking No. with the carrier name after the order is shipped.
We ship the order by FedEx / DHL / EMS / UPS most of the time. It's take 3-7 days to arrive. In holidays or other inresistible conditions (such as erathquake, hurricane etc...) will few days delay.
Please make sure you shipping address and other shipping info is correct and precise.
You could get the tracking No. and carrier name in your order shipping confirm email and track your order in the official website of shipping carrier.

Return & Refund
We offer a 30-day guarantee on receipt of parts. Please check whether the product is in good condition after receiving.
Please contact us via E-mail before you return the products, and we will send you the return address after confirmation. Shipping charges for return will be borne by the buyer, unless faulty or damaged products are received.
After receiving your return and checking that there is no problem, we will refund your money. The refund will be returned to your payment account in a few days.