I installed headers on my 67 camaro about 15 years ago. I had to dent one of the tubes, for the steering box. When I drive my car on the highway I feel vibrations in the steering wheel. After frontend alignments and tire balancing, I go back to the header/steeringbox dilemma. Some one told me that I might want to buy "tight tubes" or "Block hugger" headers, to remedy this. Or should I try to dent the tube more??? The headers are about 10-15 years old.