NOS GM 3848272 hood hinge 29 count springs which were stronger then the regular 26 count springs to hold up the optional cowl induction hood or standard SS domed hoods only on 69 Camaro SS Z28 or 1970 to 72 Chevelle SS, also correct for standard heavy 1970 to 72 Monte Carlo. These are now discontinued by GM and nothing is better for your hood then GM parts.