i bought my car with headers already installed . its my first personal experience with them and it will likely be my last . the danged things drag the road on the left side .(its 2 inches longer, hanging down then the right side ) its a pain to change plugs,starter ,transmission cant even do a compression check on some cyclinders and i dont know what else yet .for street use i am just not sure of there worth . a set of shorty blockhugger style maybe ,but no more long collector tubes for me . when this set goes its likley cast manifolds go back on . mike