ARP Header Bolt Kit 12-Point BB Chevy 20041010 these are the same high

these are the same high quality 16 fin per inch cores that AFCO has always featured

3/8 in NPT Left Side

3-1/2 in ID

it's been one of three options

ARP Header Bolt Kit 12-Point BB Chevy 20041010 these are the same highARP manufactures a variety of premium grade bolt and stud kits to facilitate installation of exhaust headers including the popular stainless stud kit with 12 point nuts. The Stainless 300 material is not affected by corrosion or extreme heat, making it ideal for the application. What's more, thecompact 12 point nut lets you easily slip a socket close to the pipe. Each ARP accessory stud or bolt kit includes the specific number of parts for your