Hedman Hedders & Trans-Dapt Performance Products are two of the hot rod industries original manufacturers, dating way back to 1954.

Hedman Hedders is the original, and still the premier manufacturer of performance exhaust headers in the world. Design and produced in their California manufacturing facility since 1954, no other header …

This is the latest, most up-to-date catalog for Trans-Dapt Performance Products and Hamburger’s Performance Products Brands. It contains the entire line of factory and engine swap engine mount …

Hedman Husler Hedders are unavailable. Please visit Hedman Hedders FOr more information

Further, if test results or other evidence provides the California Air Resources Board with reason to suspect that the Tubular Exhaust Manifold System will affect the durability of emission control …

We recommend you adhere to your state’s local laws. Our testing indicates performance is not significantly affected by these devices. The use of thermal wraps will drastically shorten the life of …