These hinges are CNC machined from solid chunks of 6061-T6 billet aluminum in the USA. The hinges utilize a stainless steel nitrogen filled strut in place of the inferior stock compression springs to actuate the hood. The hinges use high quality sealed ball bearings at all pivot points for an ultra smooth and reliable operation. The hinges are available with a raw machined or bright polished finish or in a wide variety of anodized and Fusioncoated colors. Designed as direct fit, “bolt on” units, the hinges utilize the stock mounting holes with elongated slots for ease of gap adjustment. Whether you are looking for the ultimate in under-hood customizing or just want to replace your weak stamped-steel stock hood hinges with these stout billet pieces, these hinges are the answer.