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Old 02-19-2020, 02:56 PM
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1795 1795 is offline
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Join Date: Aug 2013
Location: Canandaigua, NY
Cobra Make, Engine: SPF MKII Riverside Racer FIA
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Like Jeff (1985 CCX), I run with them open, albeit mine is just a race car. I was running the mesh screens initially but was told that even they are restrictive and will cost you about 50 HP. I can attest to that, as after I removed the screens there was a huge gain in performance.

If you will be driving in sandy areas or on gravel roads you might want some filtering. With a race car I am rebuilding the engine every couple of years so getting a little dust in there is not as concerning.
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