{"product_id":"hjc-c91-lower-vent-set","title":"HJC C91 Lower Vent Set","description":"\u003cdiv class=\"trd trd--hjc\"\u003e\n\u003csection class=\"trd-hero\"\u003e\u003cp class=\"trd-eyebrow\"\u003eHJC · Helmet Parts\u003c\/p\u003e\n\u003ch2 class=\"trd-headline\"\u003eReplacement Lower Vent Set for HJC C91\u003c\/h2\u003e\n\u003cp class=\"trd-lead\"\u003eThe HJC C91 Lower Vent Set is a replacement vent component designed specifically for the HJC C91 helmet. It’s intended to restore proper lower-vent function when the original part is worn, damaged, or missing.\u003c\/p\u003e\n\u003cp class=\"trd-lead\"\u003eBuilt to help improve airflow and ventilation, this lower vent set supports better comfort and cooling during rides. It’s offered in multiple color options to match the helmet’s look, and it’s designed for straightforward installation, making it a practical choice for routine maintenance or a quick refresh of the helmet’s ventilation hardware.\u003c\/p\u003e\n\u003cul class=\"trd-chips\"\u003e\u003cli class=\"trd-chip\"\u003e\n\u003cspan class=\"trd-chip-label\"\u003eFits\u003c\/span\u003e\u003cspan class=\"trd-chip-value\"\u003eC91\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\u003cdiv class=\"trd-cards trd-cards--2\"\u003e\n\u003carticle class=\"trd-card\"\u003e\u003cdiv class=\"trd-card-body\"\u003e\n\u003cp class=\"trd-label\"\u003eVentilation\u003c\/p\u003e\n\u003ch3 class=\"trd-card-title\"\u003eImproved Airflow Function\u003c\/h3\u003e\n\u003cp class=\"trd-card-text\"\u003eDesigned to enhance airflow and ventilation, the C91 Lower Vent Set helps support cooling and riding comfort by restoring lower-vent performance. It’s a simple way to bring back the ventilation function that can be reduced when the original vent components become damaged or degraded.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"trd-card\"\u003e\u003cdiv class=\"trd-card-body\"\u003e\n\u003cp class=\"trd-label\"\u003eInstallation\u003c\/p\u003e\n\u003ch3 class=\"trd-card-title\"\u003eDurable and Easy to Install\u003c\/h3\u003e\n\u003cp class=\"trd-card-text\"\u003eMade from durable, long-lasting materials, this vent set is intended for quick maintenance or replacement. Its easy-install design helps riders handle a vent refresh with minimal downtime, keeping the helmet ready for regular use.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003csection class=\"trd-story trd-story--text\"\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003cp class=\"trd-label\"\u003eVentilation\u003c\/p\u003e\n\u003ch3 class=\"trd-story-title\"\u003eRestore Lower Ventilation\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eThe C91 Lower Vent Set is built to bring back lower-vent airflow on HJC C91 helmets. When a vent is cracked, missing, or no longer functioning as intended, replacing it can help return the helmet’s ventilation behavior and improve comfort and cooling during the ride. Because it’s designed specifically for the C91, it’s a straightforward way to maintain the helmet’s original vent layout without changing to a different setup.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-story trd-story--text\"\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003cp class=\"trd-label\"\u003eInstallation\u003c\/p\u003e\n\u003ch3 class=\"trd-story-title\"\u003eQuick Maintenance Replacement\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eThis replacement lower vent set is designed for easy installation, helping make routine upkeep simpler. It’s suited for riders who want a practical fix after normal wear or an impact that damages external vent parts. With multiple color choices available, it can also be used to match the helmet’s existing finish while keeping the ventilation components in working order.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--options\"\u003e\u003ch2 class=\"trd-section-title\"\u003eAvailable Colors \u0026amp; Sizes\u003c\/h2\u003e\n\u003cdiv class=\"trd-table-wrap\"\u003e\u003ctable class=\"trd-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eColor\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eSizes\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eHJC Part Numbers\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003eOne Size\u003c\/td\u003e\n\u003ctd\u003e0947-2105-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNardo Gray\u003c\/td\u003e\n\u003ctd\u003eOne Size\u003c\/td\u003e\n\u003ctd\u003e0947-2187-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSemi Flat Black\u003c\/td\u003e\n\u003ctd\u003eOne Size\u003c\/td\u003e\n\u003ctd\u003e0947-2135-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSemi Flat Pearl\u003c\/td\u003e\n\u003ctd\u003eOne Size\u003c\/td\u003e\n\u003ctd\u003e0947-2149-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSemi Flat Titanium\u003c\/td\u003e\n\u003ctd\u003eOne Size\u003c\/td\u003e\n\u003ctd\u003e0947-2147-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003ctd\u003eOne Size\u003c\/td\u003e\n\u003ctd\u003e0947-2109-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--compatibility\"\u003e\u003ch2 class=\"trd-section-title\"\u003eCompatible Helmets\u003c\/h2\u003e\n\u003cdiv class=\"trd-table-wrap\"\u003e\u003ctable class=\"trd-table\"\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003eHJC C91\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"trd-notice\"\u003eCompatibility as listed by HJC for this part.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"HJC","offers":[{"title":"Black \/ One Size","offer_id":68192060735639,"sku":"0947-2105-00","price":5.99,"currency_code":"USD","in_stock":true},{"title":"Nardo Gray \/ One Size","offer_id":68192060768407,"sku":"0947-2187-00","price":5.99,"currency_code":"USD","in_stock":true},{"title":"Semi Flat Black \/ One Size","offer_id":68192060801175,"sku":"0947-2135-00","price":5.99,"currency_code":"USD","in_stock":true},{"title":"Semi Flat Pearl \/ One Size","offer_id":68192060833943,"sku":"0947-2149-00","price":5.99,"currency_code":"USD","in_stock":true},{"title":"Semi Flat Titanium \/ One Size","offer_id":68192060866711,"sku":"0947-2147-00","price":5.99,"currency_code":"USD","in_stock":true},{"title":"White \/ One Size","offer_id":68192060899479,"sku":"0947-2109-00","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/C-91_Lower_20Vent_20ST_20Titanium_0947-2147-001686158518-430206.jpg?v=1793286455","url":"https:\/\/allamericanktm.com\/products\/hjc-c91-lower-vent-set","provider":"All American KTM","version":"1.0","type":"link"}