Peter Burgess is a self-taught engineer. His background in psychology laid the groundwork for a scientific method approach, and gave him the ability to harness his intuition in making engines work. He works holistically to modify engines, and runs a small, friendly tuning business in Derbyshire, which enjoys worldwide recognition and distribution. David Gollan is a qualified Mechanical Engineer. He has a comprehensive knowledge of engineering principles which, combined with his natural flair for understanding airflow, results in outstanding product performance. David works as a Hydrometrist for the Environment Agency and acted as a technical consultant for Peter Burgess, author of How to Build, Modify & Power Tune Cylinder Heads.