Rochester 4GC Grose Jet Needle and Seat Assembly - Sold In Pairs 
- Intended for NHRA Stock & Super Stock Drag Racing
- 5/16"-24 Male Thread - with Gaskets
- numbers indicate orifice sizes
- 1 pair of each as noted  
* A = .114" & .130"
* B = .130" & .145"
* C = .145" & .145"
** We had these custom made for us by Ansel Grose himself (rip)
** When our limited supply has sold out, there won't be anymore... Ever!