Product Description
- 1" thick, four-hole aluminum spacer with replaceable tapered inserts (sold separately)
- Can be quickly changed after carb is removed
- Restricts air/fuel entry and reduces power slightly to prevent wheel spin
- Inserts range in size from 0.950" to 1.400" for custom tailoring and quicker lap times
- Fits all Holley 4bbl. 4150/4160 series carburetors
