The PCP cast aluminum primary cover is a specially engineered cover that replaces the stock tin primary covers on 1937 to 1969 Harley Bigtwins. It comes with all the necessary hardware. The cover is very slim and fits best with a 1-1/2" belt drive and American Prime Mfg. Comp. Master clutch. These covers are all match sanded and hand finished to ensure the best possible fit. They are each numbered and made to order. The mid-shift option is available for no additional charge. It comes in raw or polished aluminum. Please allow 6 to 8 weeks lead time to process your order.