Holley 2300 4150 4160 Annular Booster Insert 12 Hole .500 I.D. Black QFT AED CCS

• Annular booster inserts with 12 discharge holes to improve fuel atomisation and throttle response
• .500 inch internal diameter suitable for performance Holley-style carburettors
• Billet construction supplied as a complete set of four inserts and four banjos

These annular booster inserts are designed to upgrade or replace existing boosters in Holley-style carburettors, improving fuel atomisation and drivability across the rpm range. Each insert features twelve precisely sized discharge holes to deliver a finer fuel spray, helping reduce flat spots and improve throttle response.

The inserts press into the booster banjo and are supplied with matching billet annular booster banjos. Installation requires a swedging booster installation tool to correctly seat and secure the banjos.

Specifications:

• Insert internal diameter: .500 inch
• Discharge holes: 12 holes, .062 inch each
• Press-in surface diameter: .80 inch
• Overall insert length: .88 inch
• Colour: Black
• Material: Billet aluminium

Kit contents:

• 4 x annular booster inserts
• 4 x annular booster banjos

Notes: A swedging booster installation tool is required for installation, or contact us for fitting service. Always confirm compatibility with your carburettor before purchase.