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The ECM and wiring harness required to run the engine are also sold separately for $1,600. Hernandez says this is all quality stuff, with OE-style loom and wire wrap. He also likes the relay box that includes LED indicators to verify that all the components are getting power. Per NMRA rules, no fiddling with the ECM is allowed, and at any time, an NMRA tech official can reflash your ECM in the staging lanes or even swap it with the ECM from a competitor's car, all in the interest of keeping the playing field level.