LPGNATURAL GAS STANDBY GENERATOR SETS WITH PSI ENGINES, 60 HERTZ, 1800 RPM NOTES FOR SP SERIES GEN-SETS: OPEN UNITS: EQUIPPED WITH MANIFOLDTURBO EXHAUST PIPE, FLEX CONNECTOR, AND CLAMPS (FOR SILENCER SEE PAGE 12). LEVEL 2: SOUND ABSORBING FOAM WITH 4 LB. DENSITY THROUGHOUT HOUSINmore...