The part that started it all!! Our best seller, and the most widely used adapters in the industry. These are 100% designed and manufactured in house, not relabeled products. These spacers are the originals, which are are being copied, and sold as knock offs on ebay, amazon and other copycats for MORE money. Each BILLET spacer kit comes with bolts, instructions, and factory LS1/2/6 style intake gaskets.