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Originally Posted by mr0077
This means that you can run an Extreme lid with a 3 1/2" element, a 3" with a dome-top metal lid (a flat or low-rise lid will also hit the air horn), or you can mill off the air horn to use a flat or low-rise lid or the Extreme top. Consider that milling the air horn with this base and using a low lid may cause turbulent air flow into the carb.
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Thanks, Ken, interesting reading. I have been playing around with trying to find the ideal filter set up for the last 18 months because of very tight hood to carb clearance. When I first got the car it only had a 9" diameter by 2" high element and I always got a gas smell while driving the Cobra. I talked to an engine builder and after mentioning the gas smell he said it was a common problem to siphon gas back when the air cleaner top lid sits very close to the air horn/choke tower. I had a friend mill off the tower and it definitely made a difference in the gas smell. At the same time we cut another 1/4" or so off of the bottom lip of the 9" filter base and fitted a 2 1/2" high filter element. That combo improved the intake air flow and carb response.
After all that, I installed a K&N 14" drop base filter with a 3" high element with metal domed lid, again with airflow improvement, although I noticed that the lid's edge hits the underside of the hood's scoop and chips the paint slightly when getting hard on the throttle.
Just recently bought but yet to install the K&N Extreme top, anxious to see what difference it will make in the SVO351W HO.
I'm beginning to think with all the money I spent on filters I could have installed a 427R Roush.
Ralph
