{"product_id":"bevinsee-ls-overdrive-alternator-pulley-3-od-6-rib-cnc-billet-aluminum-black-anodized","title":"Bevinsee LS Overdrive Alternator Pulley 3\" OD 6‑Rib — CNC Billet Aluminum, Black Anodized","description":"\u003cp\u003e\u003cstrong\u003eBevinsee LS 3\" OD overdrive alternator pulley is a CNC-machined, 6-rib billet aluminum pulley designed to increase alternator speed on compatible LS V8 engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis pulley swaps in for factory 6-rib LS alternator pulleys to deliver a higher drive ratio, helping the alternator reach operating RPM sooner. Built from aircraft‑grade 6061 billet aluminum and finished in durable black anodize, it combines lightweight strength with corrosion resistance for long service life. The pulley is specifically sized and machined for LS-type factory alternators on many GM V8 platforms; it is not compatible with Corvette\/CTS‑V clutch or decoupler alternator systems.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this pulley affect alternator speed and charging?\u003c\/h3\u003e\n\u003cp\u003eBy increasing the effective diameter compared with some factory pulleys, the overdrive pulley spins the alternator faster at a given engine RPM. That faster rotation helps the alternator reach its voltage-regulating range more quickly at idle and low engine speeds without changing engine tuning. It’s a mechanical change only — no special wiring or electronics are needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3\" outside diameter for a higher drive ratio\u003c\/li\u003e\n  \u003cli\u003e6-rib profile matches factory belt routing for compatibility\u003c\/li\u003e\n  \u003cli\u003eSpeeds alternator earlier in the RPM band for improved low-RPM output\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fit my LS swap or original GM V8?\u003c\/h3\u003e\n\u003cp\u003eThe Bevinsee pulley is made for LS-style 6-rib factory alternators used across many GM trucks, SUVs and F‑body cars. It fits most 1998–2006 F-body, 2004–2006 GTO and 1999–2013 truck\/SUV V8 models that use a non-clutch alternator. It will not fit alternators with a clutch\/decoupler system, such as Corvette or CTS‑V units.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with most LS1, LS2, LS3 and LS6 factory alternators\u003c\/li\u003e\n  \u003cli\u003eDesigned for 6-rib belt configurations common in swaps\u003c\/li\u003e\n  \u003cli\u003eNot compatible with clutch\/decoupler alternator pulleys\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and machining standards are used?\u003c\/h3\u003e\n\u003cp\u003eThis pulley is CNC machined from 6061 T6 aircraft-grade billet aluminum for strength and light weight. The anodized black finish improves corrosion resistance and gives a clean, sporty look under the hood. Precision machining ensures concentricity and a consistent belt track for reliable operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e6061 billet aluminum for durability and reduced weight\u003c\/li\u003e\n  \u003cli\u003eHigh-precision CNC machining for accurate fit\u003c\/li\u003e\n  \u003cli\u003eBlack anodize for corrosion resistance and aesthetics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what tools are required?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for someone comfortable with basic engine work. Remove the factory pulley using an alternator pulley puller, then press the Bevinsee pulley onto the alternator shaft with a suitable press or arbor tool. No modification to the alternator housing or wiring is necessary.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires alternator pulley puller and press or arbor tool\u003c\/li\u003e\n  \u003cli\u003eDrop-in replacement for LS-type 6-rib alternators\u003c\/li\u003e\n  \u003cli\u003eTypical installation time: under one hour for experienced DIYers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Bevinsee LS 3\" overdrive alternator pulley is aimed at enthusiasts performing LS swaps, street performance upgrades, or anyone wanting improved alternator output at low RPM on compatible GM V8s. Choose this pulley if you use a standard 6-rib LS alternator and need a precision-machined, corrosion-resistant option that installs with common shop tools. Avoid this pulley if your vehicle uses a clutch or decoupler style alternator pulley (Corvette, CTS‑V, or similar systems).\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this pulley work on Corvette or CTS-V alternators?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. It is not compatible with clutch\/decoupler style alternator pulleys used on Corvette and CTS‑V models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need special wiring after installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No wiring changes are required; it installs as a mechanical replacement on compatible LS 6-rib alternators.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Bevinsee","offers":[{"title":"Default Title","offer_id":48086755803294,"sku":"B0D2MLL9BK","price":51.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/bevinsee-front-view-pulley.jpg?v=1785903570","url":"https:\/\/northtrailauto.ca\/products\/bevinsee-ls-overdrive-alternator-pulley-3-od-6-rib-cnc-billet-aluminum-black-anodized","provider":"North Trail Auto","version":"1.0","type":"link"}