4. SC pulley along with a LET re-tune. I also might need larger injectors at this point......In my opinion, the 178 + the SC pulley will compliment these NW Intake mani's quite nicely. I saw about 2.5 to 3 psi decrease from adding the NW mani's so by adding the SC pulley, we would not be maxing out the map sensor as Eleventeen did.



Has everyone with these manifolds seen a decrease in boost levels?