See: Kyosho Europe

Kyosho have introduced three new sets of Big Bore shock springs for the Inferno MP9 series and MP10. These springs are made with a smaller 1.5 diameter wire, compared to the original springs that used 1.6 wire. Available in 70mm for the front and 81mm and 85mm for the rear, the red front springs with 7.5 coils, the light purple front springs with 8 coils, the blue rear springs with 8 and 9 coils, the light purple rear springs with 10 coils and the red rear springs with 8.5 coils are available in set of two springs.