Home Products tractor parts john deere horsepower modules 7320, 7420; 7520 (03-07) 7320, 7420; 7520 (03-07) 1 Available Products SALE P5140 - Horsepower Module For 4.5L, 6.8L, 8.1L, 9.0L engine w/Nippondenso common rail. ... 1 Available Products