55-57 SBC Small Block TRI-5. TIG welded CNC machine flange. O2 sensor bung insertion included. Heavy duty quality parts. 18 gauge tubes and 3/8 flanges. The collector opening is 2 1/2. Work with both angle plugs and straight plug. These headers also work best with stock front or side motor mounts. But they will not work on the passenger side if you use edelbrock aluminum heads. The passenger side header is too much short to clear the idler arm. Plus, the inside of the 4 down tubes hit the head bolts. If your vehicle is using aftermarket components, parts from other applications, or custom-altered parts, then it is the installer’s responsibility to verify fitment. Minor modifications may be required for certain models. 1 X Pair of Exhaust Manifold Headers (Left & Right). Gaskets / Hardware as Shown. Professional Installation Is Highly Recommended (No Instruction Included). This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Exhaust & Emission Systems\Manifolds & Headers”. The seller is “rod-speed-racing” and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, Korea, South, Indonesia, South Africa, Thailand, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Croatia, Republic of, Malaysia, Brazil, Chile, Colombia, Costa Rica, Dominican Republic, Panama, Trinidad and Tobago, Guatemala, El Salvador, Honduras, Jamaica, Antigua and Barbuda, Aruba, Belize, Dominica, Grenada, Saint Kitts-Nevis, Saint Lucia, Montserrat, Turks and Caicos Islands, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Ecuador, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Vietnam, Uruguay.

• Type: Exhaust Header
• Features: Coated
• Color: Black
• Brand: RSRACING
• Items Included: Gasket
• Manufacturer Part Number: RSRH0145
• Material: Cast Iron