Description: 100% brand new, Never been tried or installed Made of High Quality T304 Stainless Steel Material Stainless Steel headers fits 1955-1957 283-400 S/B Chevy V8s They are the 3/4 style headers. Has 1-5/8" primary tubes with 2-1/2" collectors. Thick 5/16" flanges to resist warp age Professional installation is highly recommended Installation Instruction is NOT Included Package including: 1 X Set of Header Exhaust Kit Hardwares such as Gaskets and Bolts as Shown in the Picture Above Fitment: Stainless Steel Headers Fits 1955-1957 SBC Small Block Chevy Bel Air Description: 100% brand new, Never been tried or installed Made of High Quality T304 Stainless Steel Material Stainless Steel headers fits 1955-1957 283-400 S/B Chevy V8s They are the 3/4 style headers. Has 1-5/8" primary tubes with 2-1/2" collectors. Thick 5/16" flanges to resist warp age Professional installation is highly recommended Installation Instruction is NOT Included Package including: 1 X Set of Header Exhaust Kit Hardwares such as Gaskets and Bolts as Shown in the Picture Above Fitment: 1955-1957 283-400 S/B Chevy V8s For Exact Years and Models, Please Check Compatibilities Payment We accept PayPal payment and other payments through PayPal Shipping Items will be shipped within 1 business days after your payment is cleared. All Customer's items will be shipped from our CA or NJ warehourse Import duties, taxes and charges are not included in the item price or shipping charges International orders may take 1~3 weeks to arrive Returns You can return your unused items back for exchange or refund within 60 days. Please contact us for return process before you return the item. Customer service Description: 100% brand new, Never been tried or installed Made of High Quality T304 Stainless Steel Material Stainless Steel headers fits 1955-1957 283-400 S/B Chevy V8s They are the 3/4 style headers. Has 1-5/8" primary tubes with 2-1/2" collectors. Thick 5/16" flanges to resist warp age Professional installation is highly recommended Installation Instruction is NOT Included Package including: 1 X Set of Header Exhaust Kit Hardwares such as Gaskets and Bolts as Shown in the Picture Above Fitment: 1955-1957 283-400 S/B Chevy V8s For Exact Years and Models, Please Check Compatibilities