Radiator Cap

Sankei brand, Japanese built radiator caps. These are NOT the low quality caps that you buy at your local parts store. These are made specific for 22R/22RE/22RTE. Buy the correct one for your vehicle. A janky radiator cap can ruin your day. 

Take note of the size of yours, there are 2 possible sizes. Size varies by year and options on your truck, measure yours to order the correct one.