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!