HS-MotorsportsZane
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If you wanted you could buy the divided pedestal/downpipe and sx-e 66 or 69. The 66mm is around 20-30hp over the 64mm at wot, other then that there is no difference. The 64mm is more responsive down low over both of them. The 69mm will make 40-50hp over the 64mm, and is quite a bit slower down low. For overall drive ability is hard to beat the 64mm... If you want to change though just give Dallas a call here. 855-623-4450