Who We Are
STK Performance specialises in high-performance Cylinder Head Components. With years of industry experience and a passion for precision engineering, we serve customers across South Africa, the UK, and Mexico City.
Quality | Reliability | Affordability
Let us power your performance — wherever you are.
STK Performance was founded in 2003 by Simon Johnstone, who brings over 34 years of experience in the automotive performance industry. With deep expertise in Parts Interpretation and Parts Management, Simon has built STK into a trusted name for high-quality cylinder head components.
Simon’s journey into motorsport began at the age of 18, where his passion for performance quickly led to positions with VW Motorsport and Audi Sport South Africa. This hands-on experience in competitive racing environments shaped his understanding of what makes engine components truly perform under pressure.
What started as a small operation has grown into an internationally trusted name in performance parts. Today, STK Performance operates from offices in South Africa, the United Kingdom, and Mexico City — serving a global customer base with the same commitment to quality, reliability, and affordability that has defined the brand since day one.