3.9

Were you wanting to use a carb or a 4 bbl throttle body? I have made the ram type factory manifold 2bbl into a 4 bbl intake with results as good as the M-1. We did this about 5 years ago on a dakota, the guy said that it was stronger in the low RPM range and not quite as strong in the high RPM range. We did this on a 5.9L engine as the 4 bbl M-1 FI was discontinued.