I have the ERZ 200 cell HFCs and I didnt use the extended fouler just some steel wool and no cel yet with thousands of miles on it. It does have some rasp now from the HFCs but they flow well. While the power difference between 200 cell and 300 cell isnt much it should still be more just like going from 400 cell (stock) to 300 cell ones. ERZ is probably the cheaper of all and only time will tell how any of the aftermarket HFCs will fair over the years. For me bling looking products under the hood and car that cant be seen dont do it for me so I dont want to pay for that.
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2010 LS3 C6 Silver coupe corvette
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