http://gp.macau.grandprix.gov.mo/mgpc/public_html/en/main.php?cat=review&item=hero&file=karting.htm

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The waters have muddied above F3 in Europe. Historically Formula
3000 has been the final step before F1 but, since adopting
single-chassis rules in 1996, it seems to have decreased in
relevance. These days it runs Lola chassis powered by 450bhp Zytek
V8 racing engines, but F3000 is struggling to get 20 cars on the
grid. More competitive in Europe these days is the Superfund World
Series by Nissan, for 2.5-litre, 450bhp V6 Nissan-engined Dallara
chassis. Renault has placed two drivers, Franck Montagny and Heikki
Kovalainen, in this series for 2003, and among their rivals are
sometime F1 racers Marc Gene and Stephane Sarrazin. Both these
championships expose their drivers to speeds of around 175mph.