The stage 5 is the largest camshaft we offer. It's massive .660" valve lift and high duration lobes are best suited for larger engines above 2500CC where maximum power and RPM is desired. In our opinion and customer feedback it is too large for 2300cc circle track engines with it's 5500-9500 rpm range however some have made it work. If you want the biggest cam that will fit in a 2.3L Ford, this is it! We recommend our matched Beehive X series solid roller valve springs for this cam that are 190# closed seat pressure.