Moroso has introduced Part Nos. 22119, 22121 and 22122, GM LS Oil Pumps. 

PART #22119
GM LS Standard Volume/Standard Pressure, Oil Pump 
GM LS SERIES STANDARD VOLUME, STANDARD PRESSURE OIL PUMP 
Fits: Gen III and Gen IV; 4.8L, 5.3L, 6.0L, 6.2L 
Great upgrade, replacement over factory GM oil pumps 
Will fit with stock timing cover 
Not suitable with engines that feature Active Fuel Management (AFM) 

PART #22121
GM LS High Volume/High Pressure, Oil Pump 
GM LS SERIES HIGH VOLUME, HIGH PRESSURE OIL PUMP 
Fits: Gen III and Gen IV; 4.8L, 5.3L, 6.0L, 6.2L 
Great upgrade, replacement over factory GM oil pumps 
Volume will increase by 33% over stock oil pumps. Includes 10% higher pressure bypass spring which is beneficial over factory pumps in vehicles equipped with Accumulators, oil coolers and/or remote oil filters. 
Will fit with stock timing cover Great upgrade for engines with Moroso or aftermarket oil pans and those engines that feature Active Fuel Management (AFM) 

PART #22122
GM LS Standard Volume/High Pressure, Oil Pump 
GM LS SERIES STANDARD VOLUME, HIGH PRESSURE OIL PUMP 
Fits: Gen III and Gen IV; 4.8L, 5.3L, 6.0L, 6.2L 
Great upgrade, replacement over factory GM oil pumps 
Includes 10% higher pressure bypass spring which is beneficial over factory pumps in vehicles equipped with Accumulators, oil coolers and/or remote oil filters 
Will fit with stock timing cover 
Not suitable with engines that feature Active Fuel Management (AFM) 

For more info: www.moroso.com