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This K&N Stubstack is designed to be used with Holley 390-850 cfm square bore carbs (4150/4160), that have had the choke horn milled off and still use an air cleaner. Eliminates the need for hand polishing and radius work. Will work with all K&N Custom Chrome Racing Air Cleaners, including Tall Velocity Stack Air Cleaners. The K&N Stubstack is designed to increase the airflow of carburetors by decreasing the restriction around the choke horn.
Installation Instructions
Installation Instructions
Your order of $500 or more gets free standard delivery.
- Standard delivered 4-5 Business Days
- Express delivered 2-4 Business Days
Orders are processed and delivered Monday-Friday (excluding public holidays)
eMarket members enjoy free returns.
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