{"product_id":"mad4metal-pontiac-sd-421-super-duty-billet-aluminum-badge-cnc-usa","title":"Mad4Metal Pontiac SD-421 Super Duty Billet Aluminum Badge CNC USA","description":"\u003c!-- HEADER BAR --\u003e\n\u003cp style=\"text-align:center; font-weight:bold; font-size:13px; letter-spacing:0.5px; margin-bottom:20px;\"\u003e\n  CNC Machined in the USA  |  6061 Billet Aluminum  |  Complete Hardware Kit Included\n\u003c\/p\u003e\n\n\u003c!-- HOOK PARAGRAPH --\u003e\n\u003cp\u003eWhen Pontiac bored the Super Duty engine out to 421 cubic inches for 1962 and 1963, they weren't building a street engine — they were building a weapon. The SD-421 came with cross-ram dual four-barrel induction, McKellar solid-lifter camshafts, and aluminum components that shaved weight without sacrificing strength. It powered lightweight Catalinas to some of the quickest factory stock elapsed times of the early 1960s. NASCAR banned it. NHRA eventually had to create new classes to accommodate it. The SD-421 is one of the most serious factory drag racing engines ever produced, and almost nobody outside of the Pontiac community has ever heard of it. This badge is for the ones who have.\u003c\/p\u003e\n\n\u003c!-- PRODUCT INTRO --\u003e\n\u003cp\u003eThis is the Mad4Metal Pontiac SD-421 badge — machined from a solid billet of 6061-T6 aircraft-grade aluminum. The \u003cstrong\u003eSD-421\u003c\/strong\u003e designation is CNC cut directly into the face and hand-polished to a mirror finish. No paint fill, no printing, no adhesive backing. Just aluminum and a cutting tool.\u003c\/p\u003e\n\n\u003cp style=\"font-weight:bold; font-style:italic;\"\u003eNot stamped. Not cast. Not a sticker. Machined.\u003c\/p\u003e\n\n\u003c!-- FINISH LINE CLOSER --\u003e\n\u003cp\u003eHardware holes bored at 2-3\/8\" center-to-center on 1\/4\"-28 fine thread. Mount it on the valve cover and it calls out exactly what's underneath — the way a Super Duty should.\u003c\/p\u003e\n\n\u003c!-- ABOUT THE FINISH --\u003e\n\u003ch3\u003eAbout the Finish\u003c\/h3\u003e\n\u003cp\u003eThese badges are polished to a mirror finish, but if you look closely you'll see the machining marks from the CNC cutting process — fine, consistent toolpath lines across the face. Those marks are intentional. They're what separates a real machined billet part from something that was painted, cast in a mold, or made to look like metal. A perfectly mark-free, glassy smooth surface would look like painted plastic. The toolpath lines catch light at different angles depending on where you're standing, and that shifting reflection is the signature of a part that was actually cut on a machine. If you want to bring up the high spots even more, a quick pass with aluminum polish will do it — while keeping the machining character completely intact.\u003c\/p\u003e\n\n\u003c!-- WHERE CAN YOU RUN IT --\u003e\n\u003ch3\u003eWhere Can You Run It?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eValve covers — passenger or driver side\u003c\/li\u003e\n  \u003cli\u003eEngine fenders \/ inner fender panels\u003c\/li\u003e\n  \u003cli\u003eHood underside\u003c\/li\u003e\n  \u003cli\u003eFirewall\u003c\/li\u003e\n  \u003cli\u003eDashboard or instrument panel\u003c\/li\u003e\n  \u003cli\u003eGlove box door\u003c\/li\u003e\n  \u003cli\u003eToolbox lid\u003c\/li\u003e\n  \u003cli\u003eGarage wall or man cave display\u003c\/li\u003e\n  \u003cli\u003eCar trailer interior\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- COMPLETE KIT --\u003e\n\u003ch3\u003eComplete Kit — Everything Included\u003c\/h3\u003e\n\u003cul style=\"list-style:none; padding-left:0;\"\u003e\n  \u003cli\u003e✅ Mad4Metal Pontiac SD-421 Billet Aluminum Badge\u003c\/li\u003e\n  \u003cli\u003e✅ 2x 1\/4\"-28 Stainless Steel Pan Head Screws (18-8 SS)\u003c\/li\u003e\n  \u003cli\u003e✅ 2x 1\/4\"-28 Nylon Lock Nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- SPECS TABLE --\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background-color:#f5f5f5;\"\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold; width:45%;\"\u003eMaterial\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003e6061-T6 Aircraft Grade Billet Aluminum\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eFinish\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003ePolished — machined surface marks visible (intentional character)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f5f5f5;\"\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eHeight\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003e2\"\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eWidth\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003e3\"\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f5f5f5;\"\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eThickness\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003e3\/16\"\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eBolt Hole Spacing (center to center)\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003e2-3\/8\"\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f5f5f5;\"\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eFastener Thread\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003e1\/4\"-28 Fine Thread\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eFasteners Included\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003e2x 18-8 Stainless Pan Head Screws + 2x Nylon Lock Nuts\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f5f5f5;\"\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eEngine Reference\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003ePontiac Super Duty 421 V8 — circa 1962–1963\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eWeight\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003e0.9 oz\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background-color:#f5f5f5;\"\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd; font-weight:bold;\"\u003eMade In\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border:1px solid #ddd;\"\u003eUSA 🇺🇸\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- WHY MACHINED ALUMINUM BEATS EVERYTHING ELSE --\u003e\n\u003ch3\u003eWhy Machined Aluminum Beats Everything Else\u003c\/h3\u003e\n\u003cp\u003eCast zinc cracks under vibration. Plastic fades, chalks, and eventually falls apart. Stick-on emblems peel, every time, guaranteed. 6061-T6 aluminum doesn't do any of those things. It's the same alloy used throughout the aerospace industry: light, strong, corrosion-resistant, and indifferent to the temperature swings a running engine produces. When the finish dulls, you polish it back. No repainting, no replacing, no starting over. An SD-421 deserves hardware built to the same exacting standard as the engine itself.\u003c\/p\u003e\n\n\u003c!-- MADE IN USA CLOSING --\u003e\n\u003ch3\u003eMade in the USA — Coeur d'Alene, Idaho\u003c\/h3\u003e\n\u003cp\u003eMad4Metal is a brand of Jacer Enterprises, LLC, operating out of Coeur d'Alene, Idaho. Every badge is designed, programmed, and CNC machined in-house — start to finish. No outsourcing, no overseas production runs, no drop-shipping. This badge originated as a custom order — if you need a different displacement, a unique graphic, or something not in the catalog, reach out. Custom orders are welcome.\u003c\/p\u003e","brand":"Mad4Metal","offers":[{"title":"Default Title","offer_id":51098059079995,"sku":"E6044","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0212\/7101\/9620\/files\/84591DE9-F48E-44F7-960D-A8212B90E329.jpg?v=1775343659","url":"https:\/\/blockoffplates.com\/products\/mad4metal-pontiac-sd-421-super-duty-billet-aluminum-badge-cnc-usa","provider":"Mad4Metal Jacer Enterprises","version":"1.0","type":"link"}