I JUST RECENTLY BOUGHT A SET OF 1415'S FOR MY BBK HEADERS, AND ONE OF THEM WAS BENT STRAIGHT OUT OF THE BOX! NOT IN THE WAY YOU WOULD THINK, I MEAN IF U STOOD IT UP ON THE TABLE, ONE END WOULD NOT BE TOUCHING THE TABLE, OFF BY ABOUT 1/4 INCH. THIS MADE ALL KINDS OF PROBLEMS, BUT IM HAPPY TO SAY I FORCED THEM TO WORK, AND NO MORE FUMES OR PUTTERING!!!!!!!!!!!!! i jus worked it in one bolt at a time, screw headers!!!!