[ta man]

Originally Posted by Steve C.

My situation...

I use a fiberglass hood that has a factory shaker scoop molded to it and a K&N air filter assembly that goes up inside the scoop when closed. The scoop is open at the rear.

For tuning with the installation of my current direct port fuel injection setup we put the car on a chassis dyno. At the end of the session for interest we tested and found my air cleaner assembly cost 17 HP at peak power rpm.
608 HP to the wheels with and 591 HP without. However because of the hood scoop arrangement with a Victor intake and throttle body I cannot run a large air cleaner, it's a K&N 9-inch diameter filter with a X-Stream filter top.

In my situation vent clearance is not an issue, and personally for me the loss of hoespower is no big deal.

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There is an interesting Engine Masters episode testing filters..the X-Stream tops did very well..when just drawing from the top. I'm currently going back to a stock look with my car, shaker hood and scoop and I am back in the will it fit? and will it loose power? dilemma. I have 2 scoops, stock and a higher VFN scoop.