The Best Way To Make Sure That Carburettors Stay Perfectly Sealed To The Intake Is Through The Use Of Arp's Carb Studs, Which Feature J-form Threads To Resist Loosening From Vibration. There Offered In A Variety Of Heights To Accomodate Most Any Combination Of Carb And Spacer, And They Are Available In 8740 Chrome Moly With A Black Oxide Finish Or Rust-proof Stainless Steel. Special Arp Pro Series Nascar Type Stud Kits Have One Of These Studs Drilled To Facilitate Sealing The Carburettor In The Engine By Race Officials. All Carb Stud Kits Come With Hex Nuts And Washers.