{"product_id":"sbc-5-0l-5-7l-longtube-headers","title":"SBC 5.0L\/5.7L Longtube Headers","description":"The Speed Engineering SBC Longtube Headers are engineered to enhance the exhaust system of your classic 1971-1993 Chevrolet Impala or Caprice B-body. Designed specifically for Small Block Chevy (SBC) 5.0L\/305 and 5.7L\/350 V8 engines, these headers offer a direct-fit solution for enthusiasts seeking improved performance.\n\nConstructed from durable 304 natural stainless steel, these headers feature 1-5\/8″ primary tubes that transition to 1-3\/4″ x 1-1\/2″ oval ports, designed to match standard SBC cylinder head configurations. The longtube design maximizes scavenging efficiency for better low-to-mid RPM torque, further enhanced by a 3″ collector with a merge spike. Mandrel-bent tubing ensures consistent diameter throughout, preventing restrictions, while CNC-machined flanges guarantee a precise fit at the cylinder head for a leak-free seal.\n\nIncluded with the headers are standard graphite manifold gaskets and 10x1.5x25 zinc header bolts. These headers are explicitly stated to be for V8 engines only and are not compatible with LT1 engines. It is important to note that these are race-only headers intended for closed-course competition use. Installation on a street-driven vehicle may violate emissions regulations.","brand":"Speed engineer","offers":[{"title":"Default Title","offer_id":52663772381496,"sku":"25-1231","price":105.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687686593.jpg?v=1784329468","url":"https:\/\/store.motormia.co\/products\/sbc-5-0l-5-7l-longtube-headers","provider":"MOTORMIA","version":"1.0","type":"link"}