{"product_id":"hella-355122942-drilled-vented-brake-rotor-322mm","title":"Hella 355122942 Vented Drilled Brake Rotor, 322mm 6x112","description":"\u003cp class=\"nvn-hero\"\u003eThe Hella 355122942 is a full-size front brake rotor, 322mm across and 32mm thick, with a vented and drilled face for cooling. It runs a 6x112 bolt pattern and a 67mm center bore, cast in one piece of zinc-coated gray iron. Check the fit, then buy two for the axle.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Hella 355122942 is a front brake rotor built to bring a European chassis back to a firm, honest pedal. It measures 322 millimeters across the face with a 32 millimeter nominal thickness, so it's a full-size disc meant for real stopping work, not a budget stamped part. The casting is one piece of gray cast iron, which keeps wear even and predictable over the life of the rotor.\u003c\/p\u003e\n\u003cp\u003eWhat sets this one apart from a plain-faced disc is the vented and drilled design. The internal vanes pull air through the middle of the rotor as the wheel turns, and that airflow is what keeps temperatures in check during repeated hard stops. The drilled holes in the face give heat, brake dust, and water somewhere to go, so the pad keeps clean, consistent contact even when you're working the brakes down a long grade or in the wet. You get a rotor that resists the fade you feel when a disc gets heat-soaked.\u003c\/p\u003e\n\u003cp\u003eGray cast iron is the standard here for a reason. It handles heat well, it damps vibration so you get less squeal, and it machines to a true, flat surface that runs smooth against the pad. Because this is a one-piece design, the hat and the friction ring are cast together as a single unit rather than bolted together. That keeps the part simple, strong, and easy to service.\u003c\/p\u003e\n\u003cp\u003eThe fitment specifics matter, so check them against your vehicle before you order. This rotor uses a 6 by 112 millimeter wheel bolt pattern with a 67 millimeter center bore, and the hat stands 64 and a half millimeters tall. Those numbers describe a specific European application, and the cleanest way to confirm it's right for your car is to match the Hella part number 355122942 or run your VIN. If the bolt pattern, bore, diameter, and thickness all line up, you're in the right place.\u003c\/p\u003e\n\u003cp\u003eThe zinc coating is a nice touch that pays off over time. Hella coats the hat, the edges, and the vanes so the parts of the rotor you can see through the wheel don't flash over with surface rust after the first rain. The braking surface itself wears clean the way any rotor does once the pads start riding on it, but the cosmetic areas stay looking sharp a lot longer than a bare iron disc.\u003c\/p\u003e\n\u003cp\u003eA few honest install notes. This is sold as a single rotor, so for a normal brake job you'll want two of them to do a complete axle. Always replace rotors in pairs across an axle so both sides bite the same. Plan on fresh pads at the same time, because bedding new pads against a new rotor is what sets up quiet, even braking from day one. And take the few minutes to bed them in properly with a series of moderate stops before you lean on them hard. It makes a real difference in noise and feel.\u003c\/p\u003e\n\u003cp\u003eWhen you install it, torque the wheel lug nuts to the vehicle's spec in a star pattern and re-check them after your first drive. Over-torquing can distort the hat on a rotor like this, and that's a common cause of the pulsing you feel through the pedal a few weeks after a brake job. Go by the book, seat everything evenly, and this rotor will run true.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Anyone doing their own front brake service on a vehicle that runs the 6x112, 67mm, 322mm setup and wants a quality replacement rotor with the cooling benefit of a vented, drilled face. It's a straightforward part done right. Confirm the fit, buy two, grab a set of pads, and you've got a solid brake refresh done in the driveway on a weekend.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e322 millimeter outside diameter with 32 millimeter nominal thickness, a full-size front rotor for firm, fade-resistant stops\u003c\/li\u003e\n  \u003cli\u003eVented and drilled face pulls heat out through the vanes and clears dust and water from the pad contact area\u003c\/li\u003e\n  \u003cli\u003e6 x 112 millimeter wheel bolt pattern with a 67 millimeter center bore, a specific European fitment to verify before ordering\u003c\/li\u003e\n  \u003cli\u003eOne-piece gray cast iron casting for even, predictable wear and less vibration and squeal\u003c\/li\u003e\n  \u003cli\u003eZinc-coated hat, edges, and vanes resist surface rust between drives so the visible areas stay clean\u003c\/li\u003e\n  \u003cli\u003e64-1\/2 millimeter hat height keeps the disc true to the original geometry\u003c\/li\u003e\n  \u003cli\u003eSold individually so you can match exactly what your axle needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Hella Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this sold as a pair or a single rotor?\u003c\/summary\u003e\n    \u003cp\u003eIt's a single rotor. For a normal front brake job you'll want two of them to do the complete axle, and you should always replace rotors in pairs so both sides bite evenly.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the exact dimensions?\u003c\/summary\u003e\n    \u003cp\u003e322 millimeter outside diameter, 32 millimeter nominal thickness, and a hat height of 64 and a half millimeters. Match those numbers to your original rotor to confirm the fit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat bolt pattern and hub bore does it use?\u003c\/summary\u003e\n    \u003cp\u003eA 6 by 112 millimeter wheel bolt pattern with a 67 millimeter center bore. Both need to match your vehicle, so check them before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat does vented and drilled mean?\u003c\/summary\u003e\n    \u003cp\u003eVented means there are internal vanes between two friction faces that pump air through the rotor to shed heat. Drilled means the face has holes that give heat, brake dust, and water a path away from the pad, which helps keep braking consistent when things get hot or wet.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill the zinc coating wear off the braking surface?\u003c\/summary\u003e\n    \u003cp\u003eThe coating is there to protect the hat, edges, and vanes from rust. The friction surface wears clean the moment the pads start riding on it, which is normal for any rotor. The cosmetic areas you see through the wheel stay protected.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm this fits my vehicle?\u003c\/summary\u003e\n    \u003cp\u003eThe cleanest way is to match the Hella part number 355122942 or run your VIN. Then verify the bolt pattern (6 x 112 mm), center bore (67 mm), diameter (322 mm), and thickness (32 mm) against your current rotor.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need new brake pads too?\u003c\/summary\u003e\n    \u003cp\u003eWe recommend fresh pads whenever you install new rotors. Bedding new pads against a new rotor is what sets up quiet, even braking from the start. This part is the rotor only and does not include pads, sensors, or hardware.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I bed in a new rotor?\u003c\/summary\u003e\n    \u003cp\u003eAfter install, make a series of moderate stops from moderate speed to bring the brakes up to temperature gradually, then let them cool before any hard stops. That transfers an even layer of pad material to the rotor and reduces noise and pedal pulse.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat causes brake pulsing after a new rotor?\u003c\/summary\u003e\n    \u003cp\u003eThe most common cause is uneven lug torque. Torque the wheel nuts to the vehicle's spec in a star pattern and re-check after the first drive. Over-torquing can distort the hat and show up as a pulse through the pedal weeks later.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this the same as the non-drilled Hella 355122952?\u003c\/summary\u003e\n    \u003cp\u003eThey share the same 322 mm diameter, 32 mm thickness, 6 x 112 bolt pattern, and 67 mm bore. This 355122942 adds the drilled face. Order the exact part number your vehicle calls for.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eHella 355122942 Vented Drilled Brake Rotor, 322mm 6x112\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eHella\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e355122942\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e4082300574272\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRotor Design\u003c\/th\u003e\n\u003ctd\u003eVented, Drilled\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eOne Piece Design\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOutside Diameter\u003c\/th\u003e\n\u003ctd\u003e322 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eNominal Thickness\u003c\/th\u003e\n\u003ctd\u003e32 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003ctd\u003e64-1\/2 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWheel Bolt Pattern\u003c\/th\u003e\n\u003ctd\u003e6 x 112 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHub Size\u003c\/th\u003e\n\u003ctd\u003e67 Millimeter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eZinc Coated Gray Cast Iron\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eZinc Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this sold as a pair or a single rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a single rotor. For a normal front brake job you'll want two of them to do the complete axle, and you should always replace rotors in pairs so both sides bite evenly.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the exact dimensions?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"322 millimeter outside diameter, 32 millimeter nominal thickness, and a hat height of 64 and a half millimeters. Match those numbers to your original rotor to confirm the fit.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What bolt pattern and hub bore does it use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"A 6 by 112 millimeter wheel bolt pattern with a 67 millimeter center bore. Both need to match your vehicle, so check them before ordering.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What does vented and drilled mean?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Vented means there are internal vanes between two friction faces that pump air through the rotor to shed heat. Drilled means the face has holes that give heat, brake dust, and water a path away from the pad, which helps keep braking consistent when things get hot or wet.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will the zinc coating wear off the braking surface?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The coating is there to protect the hat, edges, and vanes from rust. The friction surface wears clean the moment the pads start riding on it, which is normal for any rotor. The cosmetic areas you see through the wheel stay protected.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I confirm this fits my vehicle?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The cleanest way is to match the Hella part number 355122942 or run your VIN. Then verify the bolt pattern (6 x 112 mm), center bore (67 mm), diameter (322 mm), and thickness (32 mm) against your current rotor.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I need new brake pads too?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"We recommend fresh pads whenever you install new rotors. Bedding new pads against a new rotor is what sets up quiet, even braking from the start. This part is the rotor only and does not include pads, sensors, or hardware.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I bed in a new rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"After install, make a series of moderate stops from moderate speed to bring the brakes up to temperature gradually, then let them cool before any hard stops. That transfers an even layer of pad material to the rotor and reduces noise and pedal pulse.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What causes brake pulsing after a new rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The most common cause is uneven lug torque. Torque the wheel nuts to the vehicle's spec in a star pattern and re-check after the first drive. Over-torquing can distort the hat and show up as a pulse through the pedal weeks later.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this the same as the non-drilled Hella 355122952?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"They share the same 322 mm diameter, 32 mm thickness, 6 x 112 bolt pattern, and 67 mm bore. This 355122942 adds the drilled face. Order the exact part number your vehicle calls for.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Hella","offers":[{"title":"Default Title","offer_id":45060656693341,"sku":"2008504","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_74217704-b0e8-4e7c-abfb-6d00eba5421a.jpg?v=1789531233","url":"https:\/\/nvnmarine.com\/products\/hella-355122942-drilled-vented-brake-rotor-322mm","provider":"NVN Marine","version":"1.0","type":"link"}