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.
Fits Holley 4150/4160 carburetors with the choke horn milled off
Fits inside the air cleaner housing
Increases the airflow by reducing restriction
Reduces turbulence, improves metering accuracyProduct Description: Height: 1.69 in (43 mm)
Length: 5.13 in (130 mm)
Material Used: Polyurethane
Package Quantity: 1
Product Box Height: 3.7 in (94 mm)
Product Box Length: 10.4 in (264 mm)
Product Box Width: 10.1 in (257 mm)
Product Style: Accessories
Weight: 0 lb (0 kg)
Width: 5.13 in (130 mm)Pit Stop USA offers K&N StubStack - Fits Holley 390 - 850 CFM Square Bore Carbs (4150, 4160) w/ Choke Horn Milled Off 85-0400 at low everyday prices. Be sure to check out all our products from K&N Engineering including K&N Stub Stacks.