Thread: Headers vs. Stock manifolds & elec. Fan

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make shure the manifolds are port matched so that there are no bad edges for the exhaust to hang up on them and then start from there smooth anything that can be smoothed. one problably wont gain too much but i have seen some manifolds with big ugly casting blobs sitting inside of them and that cant be good for anything

use a high speed dremel with the flex extender and a wire wheel and run it through as much as you can til its as smooth in there as you can possibly get it....you wont gain much but you will gain a little.... another option would be to purchase shorty headers, they're less in the way but they're still very much a pain to install on that car.... you will have a little more difficulty accessing the spark plugs, which i'm sure you already have some difficulty atm..... probably not as bad as my brothers maverick with the 390 in it tho