What a waste of $1500. I was fooled into buying Martelious- exhaust headers with all the fancy pics. First set the flange would not even line up with the head bolt holes. After laying 55$ in duties the second set was worse! I finally messaged them to fit and after driving 150 miles the crossover flex pipe broke at 15 psi! Fucking garbage. Without a doubt the worst investment i ever made with my GN. Avoid these beaders at all cost!