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 Pump
3 or 4-vane pump
Billet aluminum housing
Pulls much more vacuum than stock smog pumps
Special vane material for improved seal and wear
-12AN inlet/outlet fittings won't leak
Rebuildable in 15 minutes
Mounting bracket sold separately (bolts directly to small or big block Chevy heads & any motor plate)
Enhanced Racing Vacuum Pump
4-vane pump
Anodized or natural exterior
Pulls 13.9% more vacuum and does so sooner
Weighs 12 oz less and measures 1" shorter than Original design
Sealed, maintenance-free bearings
Mounting bracket and -12AN fittings included
Belt length may change depending on mounting location (new belt may be required)
Pro Mod Racing Vacuum Pump
4-vane pump
Achieves much greater vacuum sooner
Flows up to 150% more air volume at low RPMs
Capable of up to 26 inches of vacuum
Rotor is keyed to shaft, eliminating fastener failure
Pump weighs 7 lbs, 8 oz (with bracket and fittings)
Sealed, maintenance-free bearings
Billet 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 #710-22640
Moroso Vacuum Pump Mounting Bracket #710-63910
Moroso Gilmer 28-tooth Pulley #710-64886
Moroso SB-Chevy (#710-63845) or BB-Chevy (#710-63844) Vacuum Pump Drive Kit
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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: