4150 carb dimensions
.Also, depending on your motor size, RPMs, and intake you may benefit more from an open spacer then a 4-hole...especially if you are running a smaller elbow since it artificially increases plenum volume. Unless you're carb'ed or spraying a huge shot of nitrous(which at that point you should just go direct port anyway) you don't need any magical turbulence reducing merge spikes/spirals/etc.





