Solid As A Rock Heavy Duty 20 Tooth Htd Vacuum Pump Pulley Built In Gritty Black Anodized Finish That Slides Right Over One Inch Mandrels With A Bone Tight One Eighth Keyway For Mean Street Motors
✔️ 25.4mm (1in) bore, 3.175mm (1/8in) keyway, 20.8mm pitch, pack of one
This vacuum pump pulley slides onto a oneinch (25.4mm) mandrel and uses a oneeighth (3.175mm) keyway to stay locked on your street motor shafts. You will install it to transfer power quickly and handle tough drag racing schedules. The gritty black finish keeps road debris off your drivetrain while protecting against scratches. You get exactly one unit ready to drop straight into your existing assembly. You will mount it easily without hunting for extra hardware. The tight grip handles high RPMs without skipping teeth. Your engine runs smoother when the drive stays perfectly centered. Just slide it on and tighten your bolts to secure the setup for daily track days.
✅ 20 radius tooth profile matches HTD belt tracks perfectly✅ 25.4mm (1in) inner diameter accepts standard one inch shafts
✅ 3.175mm (1/8in) slot grips firmly without wobbling during shifts
✅ Single piece packaging arrives ready for immediate bolt on work
💡 What size mandrel works best for HTD vacuum pump pulleys
You should match the pulley hole directly to your shaft diameter to prevent slipping. A precise fit makes this rig pretty handy for quick swaps and cuts vibration across the board.
- Standard street builds require a oneinch (25.4mm) bore for reliable torque transfer
- Racing setups benefit from the oneeighth (3.175mm) keyway to lock positions under load
- Metric conversions confirm that twentyfivepointfour (1in) aligns with most American stock axles