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Serpentine Pulleys

Standard Rotation Long and Short Water PumpClear Powder Coated

Replace your old V-Belt pulleys for modern No-Slip operation

 

Performance Ratios

Our performance serpentine pulley sets replace your Low performance V-belts and eliminate belt throwing while retaining your standard rotation water pump. Increases horsepower by reducing accessory drag. 12-15 h.p. at rear wheels typical. Precision CNC machined to run perfectly true. 6061-T6 aluminum for extra strength and wear.

Mid Performance Ratios

Uses performance crank pulley and high water flow water pump pulley.

High Water Flow Ratios

Increases cooling by speeding up water flow and fan speed. This helps at critical low speed driving where most overheating occurs.

Serpentine Pulleys
shown with optional alternator fan 221


*Individual Pulleys available on Pulley Kit pages


Long Water PumpChevy Small Block Long Water Pump

Long Water Pump Performance Ratios:

  Set 

Crank Pulley

W/P Pulley

Alt. Pulley with Nose Cover

P/S Pulley Keyway

P/S Pulley Press Fit

Alt. Belt Size with March Bracket : 20120

P/S Belt Size with March Bracket : 20160

 6310 

 YES   (Single)

 YES

 YES

 

 

 41"

 

 6330 

 YES  (Double)

 YES

 YES

 Optional : 616 

 Optional : 617   

 41"

 33.5"

Long Water Pump Mid-Performance Ratios:

6350

 YES   (Single)

 YES

 YES

 

 

 40"

 

6355

 YES  (Double)

 YES

 YES

 Optional : 616 

 Optional : 617  

 40"

 33.5"

Long Water Pump High Water Flow Ratios:

6370

 YES   (Single)

 YES

 YES

 

 

 42.5"

 

6380

 YES  (Double)

 YES

 YES

Optional : 623  

 Optional : 624  

 42.5"

 35"

Optional long water pump pulley nose cover : 314

NOTE FOR LONG WATER PUMP ENGINES: If you do not have a P/S pump we recommend ordering 616 (5 RIB ) or 623 (6 RIB) and a 1971-1974 Chevy Impala V8 keyed P/S pump P300P304, or 9600

 

Short Water PumpChevy Small Block Short Water Pump

Short Water Pump Performance Ratios:

Set

Crank pulley

Water pump pulley

Alternator pulley with nose cover

Optional water pump nose cover

Optional alternator fan

 6210 

 YES

 YES

 YES

Optional : 312

Optional : 221

Short Water Pump High Water Flow Ratios:

 6270 

 YES

 YES

 YES

Optional : 312

Optional : 221

NOTE: For Serpentine Power-Steering options on Short Water Pump Vehicles, see Pulley and Bracket Kits or All Inclusive Kits.

 

Detailed Information of Set Components and Size

  6310 Set Drives: W/P, Alt.

  6311 6-Rib Crank Pulley 5-3/4" dia.

  6312 6-Rib W/P Pulley 6-1/4" dia.

  208   6-Rib Alt. Pulley w/Cover

           2-3/4" dia.

 

  6330 Set Drives: W/P, Alt. and P.S.

  6331 6&5-Rib Crank Pulley 5-3/4" dia.

  6312 6-Rib W/P Pulley 6-1/4" dia.

  208   6-Rib Alt. Pulley w/Cover

           2-3/4" dia.

 

  6350 Set Drives: W/P, Alt.

  6311 6-Rib Crank Pulley 5-3/4" dia.

  6322 6-Rib W/P Pulley 5-1/4" dia.

  208   6-Rib Alt. Pulley w/Cover

           2-3/4" dia.      

  6330 and 6355 Set Optional: Matching P/S Pulley

  616 5-Rib P/S Pulley w/Keyway

  617 5-Rib P/S Pulley w/Press Fit

 

  6355 Set Drives: W/P, Alt. and P.S.

  6331 6&5-Rib Crank Pulley 5-3/4" dia.

  6322 6-Rib W/P Pulley 5-1/4" dia.

  208   6-Rib Alt. Pulley w/Cover 2-3/4" dia.

 

  6370 Set Drives: W/P, Alt.

  6371 6-Rib Crank Pulley 7" dia.

  6322 6-Rib W/P Pulley 5-1/4" dia.

  208   6-Rib Alt. Pulley w/Cover -23/4" dia.

 

  6380 Set Drives: W/P, Alt. and P.S.

  6381 6&6-Rib Crank Pulley 7" dia.

  6322 6-Rib W/P Pulley 5-1/4" dia.

  208   6-Rib Alt. Pulley w/Cover 2-3/4" dia.

  6380 Set Optional: Matching P/S Pulley

  623 6-Rib P/S Pulley w/Keyway

  624 6-Rib P/S Pulley w/Press Fit

 

  6210 Set Drives: W/P, Alt.

  6211 6-Rib Crank Pulley 5-3/4" dia.

  6212 6-Rib W/P Pulley 6-1/4" dia.

  208   6-Rib Alt. Pulley w/Cover 2-3/4" dia.

 

  6270 Set Drives: W/P, Alt.

  6271 6-Rib Crank Pulley 7" dia.

  6222 6-Rib W/P Pulley 5-1/4" dia.

  208   6-Rib Alt. Pulley w/Cover 2-3/4" dia.