{"product_id":"speedway-motors-930c7h-1955-1957-small-block-chevy-chassis-headers-ahc-coated","title":"Small Block Chevy Chassis Headers Y1887","description":"These Speedway headers allow you to keep the exhaust system under your '55-'57 Chevy car. The '3\/4-length' design provides more ground clearance than full-length headers, yet makes more power than 'shorty' style headers. These chassis headers fit 283-400 S\/B Chevy V8s and has 1-5\/8 inch primary tubes with 2-1\/2 inch collectors. These ceramic coated headers provide superior performance and durability. - Mid-length design offers maximum ground clearance - Designed to work with stock or 605 power steering box - Fits standard and Vortec-style small-block Chevy heads (not D-port, LT-1 or ZZ-4)Does not work with stock clutch linkage(Please use the chart below to help with dimensions.) Drivers side A dimension is 3-1\/2 inch up by the head and 5-5\/8 inch at the collector, B dimension is 15 inch, and C dimension is 21 inch. Passenger side A dimension is 4 inch at the head and 6-5\/8 inch at the collector, B is 15 inch, and C is 21 inch. - Dimension Chart(GIF)NOTE: These headers do not fit angle-plug heads. They do work with a '605 inchsteering box. They work with most any bellhousing and most any motor mounts. Some aftermarket starters may be in the way. Designed to fit cars using an original V-8 pitman arm. Some aftermarket arms may cause an interference. - The use of a shorty spark plug may aide in clearance between the plug wire and header primary tubes.","brand":"My Store","offers":[{"title":"Default Title","offer_id":49386769940724,"sku":"P356810034061120548","price":28.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0852\/3687\/5508\/files\/60C158E9-02F8-C0F3-7020-FDAACB19B535.jpg?v=1789355769","url":"https:\/\/lanyangyang.shop\/products\/speedway-motors-930c7h-1955-1957-small-block-chevy-chassis-headers-ahc-coated","provider":"My Store","version":"1.0","type":"link"}