E-throttle (RET)Link's external E throttle (Drive by Wire) module works with Link's G4X ECUs (except the entry level AtomX), plus G4+ ECUs (Storm and above) to give you full control of your throttle setup, allowing a faster more precise throttle response. Replace your old mechanical throttle linkage with an advanced electronic throttle module. E throttle is faster responding, requires less maintenance, gives you better fuel economy and lowers emissions.