Header wrap does trap moisture,thus increasing the chance of rust. However, if your truck is driven often (like a Toy should)it has little chance to ever take hold. In other news the wrap increases scavenging through increased velocity in the exhaust so you may expect some power/mileage increase. <img src="/forums/images/graemlins/cheers.gif" alt="" />

"If you can't learn to do something well, learn to enjoy doing it poorly".

85 22RE, 5spd 4Runner project
87 Turbo Truck, Boost Controller, otherwise stock... for now.
86 Turbo 4Runner, Project