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The suction line connects to the factory suction fitting on the frame rail
2 1/2 Inch Axle Back
1180401 - Blank 7
Air Filter (Dry Extendable) For Intake Kits: 75-5065
Direct-fit design uses OEM hangers and mounts
PPE Race Fuel Valve / Rail Plug For 01-04 LB7 Duramax blow off valves The suction line connects toThe PPE Race Fuel Valve, made from stainless steel, replaces stock or a shimmed pressure relief valve. This valve helps maintain fuel rail pressure during high engine load conditions. It eliminates potential low fuel rail pressure DTC codes P1093 or P0087 (low fuel rail pressure during power enrichment) that are caused by insufficient pressure relief valve (PRV) spring pressure. This leads to the valve opening too early which causes excessive amounts
