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Originally Posted by northwind
If you've got smart enough engine management, it could be a benefit... I think we're talking WRX STis and the like though. Or alternatively, if you're running high boost or high comp- but for it to make a real difference, you'd probably be detting all over the place on standard. I can see a few Cossie owners reaching for the boost control  |
That's exactly the people it's aimed at - which is why it's sold at more racetracks than filling stations! The fuel certificate is so you can prove to race organisers exactly what fuel you're running as many classes have restrictions.