Holley Needle & Seat 2300, 4160, 4510, 4150 350-800CFM 0.120" orifice [HNS738]

Holley Needle & Seat 2300, 4160, 4510, 4150 350-800CFM 0.120" orifice [HNS738]

3/8” 32 tpi thread 

orifice 0.120"

Viton tipped needle

Holley 6-504 18BP-61A5 & 18BP-185A (inc Performance Carburettors)
Single O-ring type 

Suits these Models:
2 BBL:
2300 350CFM Carb List No. 7448; List 4412 

4 BBL:  
4160 390 & 600CFM, Carb Nos. 6299, 1850, 6619, 4452
4510 725CFM,
4150 650, 600 725, 800CFM, Carb Nos. 4777, 4776, 4118, 4780, 7419
4150G, Carb No. 6822