Hella 355114392 Cross-Drilled Brake Rotor 295mm 6x112

This is a Hella disc brake rotor, part number 355114392, a vented and cross-drilled rotor built to a 6 x 112 millimeter wheel bolt pattern. It measures 295 millimeters across the outside diameter with a 28 millimeter nominal thickness and a 67 millimeter hub bore. If you're replacing a worn or warped rotor and your vehicle runs this bolt pattern and hub, this is a clean, direct-fit cast iron replacement.

The rotor is a one-piece casting in gray cast iron, which is still the right material for the job on most street and light-performance setups. It handles heat well, it's quiet, and it wears predictably against a standard pad. The vented design is the key here. Two friction faces with cooling vanes cast between them let air pull through the middle of the rotor as the wheel turns. That airflow carries heat away from the braking surface, which is exactly what you want on any car heavy enough or fast enough to load the brakes hard on a long downhill or a spirited back road.

Then there's the cross drilling. The holes through the face give hot gases and brake dust somewhere to go instead of building a glazed film between the pad and the rotor. On a wet day they also give water an edge to break against, so the pad bites a hair sooner on that first stop out of a puddle. You get a cleaner, more consistent pedal, and the drilled face sheds the worst of the heat film that can make a tired rotor feel grabby or vague.

Every surface on this rotor is zinc coated, including the hat, the edges, and the vanes. That coating matters more than people think. A bare cast iron rotor starts flash-rusting the day it goes on, and while the pad keeps the swept face clean, the hat and the edges turn orange fast and look terrible through an open wheel. The zinc coat holds that surface rust off for the life of the rotor, so it stays sharp behind a nice set of wheels and the hardware doesn't seize to a rusted hub down the road.

Fitment comes down to three numbers. The 6 x 112 millimeter bolt pattern, the 295 millimeter outside diameter, and the 67 millimeter hub bore all have to match your vehicle. The 67 millimeter height is the hat depth from the mounting face to the friction surface. Check those against your old rotor or your parts catalog before you order. Bolt pattern and diameter are the two that most often trip people up, so measure twice.

Where does a drilled rotor like this shine, and where doesn't it? For daily driving, the occasional load, and enthusiastic weekend runs, it's a great match. The drilling and venting keep temperatures in check for the repeated stops real roads throw at you. If you're building a dedicated track car that sees lap after lap at redline, know that drilled faces run hotter at the edges of the holes and any drilled rotor asks for careful bedding and regular inspection under that kind of abuse. For the vast majority of drivers who'll never see a road course, none of that applies, and you get the looks and the wet-weather bite with no real downside.

A couple of install notes from doing a lot of these. Replace rotors in pairs, left and right on the same axle, even if only one side looks bad. Braking is a balance job, and a fresh rotor against a worn one on the other corner pulls the car under hard stops. Fresh pads with fresh rotors is the smart move too. And bed them in properly once they're on. A series of moderate stops from around 40 to 10 miles per hour, without coming to a full stop, lays down an even transfer layer of pad material and sets you up for quiet, straight braking. Skip the bedding and you invite the shudder and squeal that gets blamed on the rotor when it's really the install.

This one is sold as a single rotor, so order two if you're doing a full axle, which you should. It doesn't come with pads or hardware, so grab those separately if you need them. For a daily driver or a weekend car that sees the occasional hard stop, a vented cross-drilled zinc-coated rotor like this is a straightforward, good-looking upgrade over a plain blank, and it'll give you honest service as long as you install it right.