The March Chevy LT1 Outward & High Mount Serpentine Kit is completely CNC machined from solid billet 6061-T6 aluminum. This translates into a spectacular looking new machined finish with perfect fit and extra strength. All of these billet pulleys and brackets have a ''No Polishing'' maintenance-free clear powder coating. The kit comes complete with stainless steel tensioning rod, chromoly rod ends and necessary hardware. This kit is designed to fit 1957 and earlier cars and all full size trucks and works with OEM, Hot Rod Air and Vintage Air A/C systems!