LEF-5 - Aiphone Mounting. Wall or desk mount. Wire Type. Variable wire types. Wire Distance. Sub Station to farthest Master Station: 650' (22AWG) 1,600 (18AWG) Dimensions. 8-1/8" H x Wiring Harnesses – Alpha Motorsports, Inc. Oct 12, 2021ALPHA MOTORSPORTS 2 LE5 ECOTEC STAND ALONE WIRING HARNESS WITH OEM ECM Product Description: This harness and computer are for a stock or nearly stock 2 LE5 Ecotec. I.E. stock injectors and stock throttle body. We use a blend of speed density and MAF tuning, so this setup requires a MAF sensor and does utilize the upstream O2.