Havok Engineering - R33 RB25DET ECU Upgrade Chip - FOR THE R33 ECU!!
Havok Engineering - Stage 2 R33 RB25DET ECU Upgrade Chip - FOR THE R33 ECU!!
Havok Engineering - Spec 1 R32 Skyline GTR RB26DETT ECU Upgrade Chip - 1 Bar!
Havok Engineering - Spec 1 R33 Skyline GTR RB26DETT ECU Upgrade Chip - 1 Bar!
