How to port gt40 lower intake
T80 flour usa
These lower intakes tend to get interchanged a lot. One GT40 intake we received did have the original lower with it - it had a lower like the one in the below picture that shows a part number with F2 (RF-F2ZE-9K461-AA) in it and can be found on the front water cross over - (RF-F3TE-9K461-EA) is also a valid GT40 lower casting number.
"There is no need to port the 200-205 cfm Cobra for either mid-160 cfm E7 heads or mid-190 cfm GT40 heads, run the intake stock. A ported lower with stock upper works very well N/A or with forced induction on AFR 165/185, TW 170, Performer, Performer RPM, or any similar heads with a 1250 size port entry.