1. Testimonials are true-to-source, being printed and scanned directly from unedited emails from customers.

2. Performance and economy tests are usually reported by customers and not done by ourselves under favourable conditions.

3. Advantages (such as gains in power or economy per dollar), requirements (perfectly sealed installation only, and a specific throttle control method), limitations and realistic expectations (less absolute power gain than very much more expensive engine modifications, superchargers or turbochargers) of the Surbo system are clearly stated on this webpage

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