Snail Tuning

I did a b16a sir one swap in a 91 integra gs the exhaust manifold on the new engin was shifted to the side compaired to the integra's. I had to remove the middle cross member to fit the exhaust manifold on. is my car safe to drive without that beam runnin from the front tranny mount to the back tranny mount off? like if i get hit from the front would it cut my legs off? also is their a company that sells headers with dual o2 scencors that icould just change with my stock headers and put the cross member back in place? give me some info and check my other threads i could use some help!!!