just want to know what i can use i want 4-1 but dont know if it will clear the crossmember

 

I don't think any header will clear the crossmember. I'm putting a DC 4-2-1 header in this week and I'm sure it will need some cutom fitting. The 4-1 header hangs even lower so you will mos def need some modification to the cross member to make it fit.

 

im using a Greddy 4-2-1 and i have about a centimeter clearance

 

I'm running a JDM DC 4-1. I had to cut the member and it hangs too dam low. I welded a 1/4'' plate to the bottom of my header to keep from crushing it! With that tight to the header it's 2'' from the ground.