Whats the difference between a K&N FIPK, volicity tube, airaid, and K&N gen II? Other than cost.

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99 F-150 Sport XLT Black x-cab 4.6L auto 3.55
K&N filter and dual series 40 flowmasters

 

Both the K&N FIPK (Fuel Injection Performance Kit) and the Airaid are the same basic thing, they are both airbox elimination kits, and they add the most power, gaining 12 hp on the 4.6, and 14 hp on the 5.4 engine.

The drop-in replacement K&N air filter element that uses the original factory airbox will gain about 5 hp on the V-8 F-150.

The Velocity tube is kind of half-way in between those 2 "extremes", for lack of a better term, and it still uses the small factory "cold air" inlet on the fender. That coupled with a K&N air filter gains about 7, maybe 8 hp on the V-8 F-150.

If you want the biggest power gain, go for the airbox elimination kit, either the Airaid or the K&N FIPK.

Hope that helps,

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Mike Troyer
Performance Products, Inc.
National Distributor of Superchips
(540) 862-9515
Email: mtroyer@compuserve.com
Performance Products F150Online Superchip ordering system: F150Online Superchip Ordering System
First National F-150 Online Rally Event Organizer

 

thanks


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99 F-150 Sport XLT Black x-cab 4.6L auto 3.55
K&N filter and dual series 40 flowmasters