Best Seller | OTC Tools & Equipment 5039 Charged Air Cooler Tester Features and Benefits: OTC s Charged Air Cooler Tester is the easy way to find air leaks in charged air cooler systems For use on class 7 and 8 truck engines Large easy to read 2-1/2 inch pressure gauge reads 0-60 PSI Kit includes regulator relief... more | | $499.99 $383.14 FREE shipping go to store |