89-91 Turbo Rx7 Racing Beat Fuel Cut Controller (11571) - NLA
These are no longer available from Racing Beat, but you can use the HKS Fuel Cut Defencer in its place.
The Fuel Cut Controller allows the Turbo II to run at higher-than-factory pre-set turbo boost pressures without experiencing pre-programmed rear rotor fuel cutoff. The Fuel Cut controller essentially deceives the ECU (computer) into thinking the boost is not as high as it actually is. Consequently, the stock boost gauge no longer displays accurate boost pressure.