{"product_id":"1964-1970-chevrolet-c40-l6-3-8l-12si-high-output-alternator","title":"1964-1970 Chevrolet C40 L6 3.8L 12si High Output Alternator","description":"\u003ch2\u003e\u003cstrong\u003e1964-1970 Chevrolet C40 L6 3.8L 12si High Output Alternator\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eUpgrade your 1964-1970 Chevrolet C40 L6 3.8L 12si with a high-output alternator from JS Alternators. This direct-fit alternator drops into your stock alternator location with no modifications required.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Fit\u003c\/strong\u003e — Drops into your factory alternator location\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne Wire Connection\u003c\/strong\u003e — Connect to any ignition-switched 12V+ source to activate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmaller Pulley Included\u003c\/strong\u003e — Spins faster for maximum output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Output Performance\u003c\/strong\u003e — Built for car audio, marine, racing, and high-demand electrical systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1964-1970 Chevrolet C40 L6 3.8L 12si\u003c\/li\u003e\n\u003cli\u003eDirect replacement — bolts into the stock alternator location\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eA smaller pulley is included — install a 1\/2\" to 1\" shorter belt for proper fit\u003c\/li\u003e\n\u003cli\u003eIf you require a specific voltage setpoint, purchase a compatible voltage regulator separately\u003c\/li\u003e\n\u003cli\u003eA Big 3 Wiring Upgrade Kit is required when installing any high-output alternator — 1\/0 gauge 100% copper wire is recommended\u003c\/li\u003e\n\u003cli\u003eThis alternator uses a one wire connection — it is not plug-and-play with your factory harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Pair this alternator with a Big 3 Wiring Upgrade Kit to ensure your electrical system can handle the increased output safely and efficiently.\u003c\/p\u003e","brand":"JS Alternators","offers":[{"title":"250 amp alternator \/ V-Belt Pulley","offer_id":53861383700852,"sku":"7111-C40-1964-1970-3.8L-250-6003L","price":399.0,"currency_code":"USD","in_stock":true},{"title":"320 amp alternator \/ V-Belt Pulley","offer_id":53861383733620,"sku":"7111-C40-1964-1970-3.8L-320-6003L","price":449.0,"currency_code":"USD","in_stock":true},{"title":"250 amp alternator \/ Double V-Belt Pulley","offer_id":53861383766388,"sku":"7111-C40-1964-1970-3.8L-250-6003L","price":399.0,"currency_code":"USD","in_stock":true},{"title":"250 amp alternator \/ 6-Rib Serpentine Pulley","offer_id":53861383799156,"sku":"7111-C40-1964-1970-3.8L-250-6003L","price":399.0,"currency_code":"USD","in_stock":true},{"title":"320 amp alternator \/ Double V-Belt Pulley","offer_id":53861383831924,"sku":"7111-C40-1964-1970-3.8L-320-6003L","price":449.0,"currency_code":"USD","in_stock":true},{"title":"320 amp alternator \/ 6-Rib Serpentine Pulley","offer_id":53861383864692,"sku":"7111-C40-1964-1970-3.8L-320-6003L","price":449.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/2300\/1972\/files\/1-12si-v1-angle_3b3c9cbb-fda7-4e45-beee-3722fc0da401.png?v=1769471982","url":"https:\/\/jsi-racing.com\/products\/1964-1970-chevrolet-c40-l6-3-8l-12si-high-output-alternator","provider":"JSI Racing","version":"1.0","type":"link"}