Extra vacuum boosts power by: improving ring seal; preventing blow-by, intake charge contamination, and detonation; allowing the use of low-tension piston rings for less friction. These purpose-built vacuum pumps offer such power advantages in three designs to accommodate any engine combination and requirement. Use Moroso replacement pump fittings only. Moroso Vacuum Pump FAQs.
Original Racing Vacuum Pump3 or 4-vane pumpBillet aluminum housingPulls much more vacuum than stock smog pumpsSpecial vane material for improved seal and wear-12AN inlet/outlet fittings won't leakRebuildable in 15 minutesMounting bracket sold separately (bolts directly to small or big block Chevy heads & any motor plate)
Enhanced Racing Vacuum Pump4-vane pumpAnodized or natural exteriorPulls 13.9% more vacuum and does so soonerWeighs 12 oz less and measures 1" shorter than Original designSealed, maintenance-free bearingsMounting bracket and -12AN fittings includedBelt length may change depending on mounting location (new belt may be required)
Pro Mod Racing Vacuum Pump4-vane pumpAchieves much greater vacuum soonerFlows up to 150% more air volume at low RPMsCapable of up to 26 inches of vacuumRotor is keyed to shaft, eliminating fastener failurePump weighs 7 lbs, 8 oz (with bracket and fittings)Sealed, maintenance-free bearingsBillet bracket and -16AN beaded fittings included (bracket mounts to motor plate & rotates 360°)
JEGS EZ Complete Kits are designed by JEGS professionals so you get all the parts you need. For small or big block Chevy, an Original 3-Vane Vacuum Pump Kit includes:Moroso Original 3-Vane Racing Vacuum Pump #710-22640Moroso Vacuum Pump Mounting Bracket #710-63910Moroso Gilmer 28-tooth Pulley #710-64886Moroso SB-Chevy (#710-63845) or BB-Chevy (#710-63844) Vacuum Pump Drive KitMoroso -12AN Valve Cover Fitting #710-22635JEGS Remote Oil Breather Tank #555-52200JEGS -10AN to -12AN Hose Adapter #555-110168JEGS -12AN Straight Swivel Hose Ends #555-100004JEGS -12AN 90° Swivel Hose Ends #555-100024JEGS -12AN Pro-Flo Braided Hose #555-100941
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