{"product_id":"brian-crower-bc0984","title":"Polaris Pro R (21-up) Stage 4 Full Drag Spec (pair)","description":"\u003cp\u003eBrian Crower Stage 4 full drag spec camshafts are the top tier grind for an all-out, high rpm Polaris RZR Pro R (21-up) build.\u003c\/p\u003e\n\u003ch3\u003eWhy it holds up\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAdvertised duration (.020\"): 276°\/276°\u003c\/li\u003e\n\u003cli\u003eDuration @ .050: 252°\/252°\u003c\/li\u003e\n\u003cli\u003eValve lift (1:1): .460\"\/.460\" (11.68\/11.68 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFits\u003c\/h3\u003e\u003cul\u003e\u003cli\u003ePolaris RZR Pro R (21-up)\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eCamshafts (pair)\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eGood to know\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRequires a BC spring\/retainer kit.\u003c\/li\u003e\n\u003cli\u003eBecause of the high lobe lift, you must change the valve guides and use BC valve seals. Skipping this causes retainer to guide contact that damages the head and\/or cams.\u003c\/li\u003e\n\u003cli\u003eMust run aftermarket pistons with proper valve reliefs. Cannot run with stock\/OE pistons because of possible piston to valve contact.\u003c\/li\u003e\n\u003cli\u003eECU and cylinder head work will add to overall performance.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Brian Crower, Inc","offers":[{"title":"Default Title","offer_id":67822851752030,"sku":"BC0984","price":799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/2406\/7678\/files\/Polaris-Pro-R_26c08c47-ff23-47a3-9201-66a8aa7c20d0.jpg?v=1792614973","url":"https:\/\/bonafidesxs.net\/products\/brian-crower-bc0984","provider":"Bona Fide SXS","version":"1.0","type":"link"}