pretty amazing ! wish I had the dual plug engine , but will pass on the info, any quantifiable results from this change, or at least a measureable improvement, my dream ecomod at this point is a clean 89 to 93 mustang 4 cyl 5 speed, they get close to 40 stock, and super long lived engine combo. 400 K not out of the question . and really , important thing to me , to work on ,
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