Vacuum Pump Pulley,Gilmer 36 Tooth, 3/8 Pitch Type "L" With Belt Guides• Fits Moroso Racing Vacuum Pumps or similar "smog" pumps that use OE-style, 3-bolt mounting pattern accepts standard Gilmer belts with 1/2" width or less • Precision machined from aircraft-quality aluminum and features direct, bolt-on installation • Use with Moroso 3- or 4-Vane Vacuum Pump Nos. 22640, 22641, 22642, 22643, 22644, 22840, 22842 and interchangeable drive components