my bros ek with a mini me goes to 8 easy and sounds like it would go more. heads built and bottom end just stock. installed a holly cda iginition and wow made it even better. pulls hard. D SERIES are Crazy. going to install his xs power turbo kit here soon. I only take it to 6 now. i was taking it to 7 when n/a. Scary as hell thou lol..
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