{"id":10763,"date":"2023-06-04T18:58:25","date_gmt":"2023-06-05T02:58:25","guid":{"rendered":"https:\/\/sandersonheaders.com\/?post_type=product&#038;p=10763"},"modified":"2025-04-21T09:46:11","modified_gmt":"2025-04-21T17:46:11","slug":"o455-header-set-oldsmobile-350-455","status":"publish","type":"product","link":"https:\/\/sandersonheaders.com\/product\/o455-header-set-oldsmobile-350-455\/","title":{"rendered":"O455 Header Set, Oldsmobile 350 455"},"content":{"rendered":"<p>The O455 header set fits Oldsmobile 455 engines in a variety of street rods and customs, that do not have a cross member under the center of the engine. Its compact design clears all types of steering and motor mount setups.<\/p>\n<p><strong>NOTES:<\/strong><\/p>\n<ul>\n<li>Oldsmobile cylinder heads have different-sized exhaust ports. However, the mounting bolt pattern is the same for both the Sanderson <a href=\"https:\/\/sandersonheaders.com\/product\/o350-header-set-oldsmobile-350-455\/\">#O350<\/a> and #O455 header sets.<\/li>\n<li>Part <a href=\"https:\/\/centuryperformance.com\/sanderson-o350-header-set-oldsmobile\/\" target=\"_blank\" rel=\"noopener\">#O350<\/a> uses a 1-5\/8&#8243; primary tube diameter, and the #O455 uses 1-7\/8&#8243; primary tubes.<\/li>\n<li>It is OK to have the exhaust flange slightly smaller than the exhaust port on the cylinder head. Don&#8217;t be greedy! All but heavily modified Olds 455 engines typically perform best with the smaller <a href=\"https:\/\/centuryperformance.com\/sanderson-o350-header-set-oldsmobile\/\" target=\"_blank\" rel=\"noopener\">#O350<\/a> header.<\/li>\n<li>Please use the attached dimension graphic to determine whether the <a href=\"https:\/\/sandersonheaders.com\/product\/o350-header-set-oldsmobile-350-455\/\">#O350<\/a> or #O455 header set is best for your application.<\/li>\n<li><span style=\"color: #ff0000;\"><em>Neither header set is compatible with Oldsmobile Rocket applications<\/em><\/span><\/li>\n<\/ul>\n<p>Includes all hardware necessary for installation.<\/p>\n<p><strong>SPECIFICATIONS:<\/strong><\/p>\n<p>Engine: Oldsmobile 260-455 V8<br \/>\nPrimary Tube Diameter: 1-7\/8&#8243;<br \/>\nCollector Diameter: 3.0&#8243;<\/p>\n<p><strong>FEATURES:<\/strong><\/p>\n<ul>\n<li>16-Gauge Primary and Collector Tube Thickness<\/li>\n<li>3\/8&#8243; Thick Flange<\/li>\n<li>Patented Flange Design Requires NO Gaskets<\/li>\n<li>Tightest Fitting Header Available Anywhere!<\/li>\n<li>Made in the USA<\/li>\n<\/ul>\n<p><strong>INCLUDES:<\/strong><\/p>\n<ul>\n<li>Header Bolt Set<\/li>\n<li>Collector Reducer Set<\/li>\n<\/ul>\n<p><strong>FINISH:<\/strong><\/p>\n<p>Our <strong>Ceramic Coating<\/strong> is recommended for every vehicle application and is the default finish selection choice above. To meet high standards of quality, We apply a multi-layer inside and outside aluminized ceramic coating in-house and then polish the coating to a high luster. This aerospace and military-grade technology adds excellent protection to your headers while offering the benefit of thermal control in your engine bay. It also improves cylinder scavenging of exhaust gases and increases the longevity of your header investment.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The O455 header set fits Oldsmobile 350 and 455 engines in a wide range of street rods and customs.<\/p>\n","protected":false},"featured_media":712,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[87,326,327,325],"product_tag":[329,331,328,330],"class_list":{"0":"post-10763","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-street-rod","7":"product_cat-326","8":"product_cat-327","9":"product_cat-oldsmobile","10":"product_tag-olds-350","11":"product_tag-olds-455","12":"product_tag-oldsmobile-350","13":"product_tag-oldsmobile-455","15":"first","16":"instock","17":"taxable","18":"shipping-taxable","19":"purchasable","20":"product-type-variable","21":"has-default-attributes"},"_links":{"self":[{"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/product\/10763","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/comments?post=10763"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/media\/712"}],"wp:attachment":[{"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/media?parent=10763"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/product_brand?post=10763"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/product_cat?post=10763"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/sandersonheaders.com\/wp-json\/wp\/v2\/product_tag?post=10763"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}