We have now developed our big tooth 2WD cosworth gear box conversion , these have been tested in race and rally upto 680 BHP , they are 5 speed and syncro gear change , price is 3350 pounds 1st Gear ratio 3.01 :1 2nd Gear ratio 1.98 :1 3rd Gear ratio 1.33 :1 4th Gear ratio 1 :1 5th Gear ratio 0.81 :1