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Discussion Starter #1
I've replaced the front rotors on my 2004 impala 5 times in the last 3 years. Every set of rotors I get seems to be garbage, even though I'm specifically trying to find ones of good quality.

Before anyone tells me the problem is somewhere else, I also have new front wheel bearings, struts, steering rack, tie rod ends, control arms, calipers, sway bar end links, and sway bar bushings.

The last set of rotors I got hummed during braking. They produce a very "grindy" feel whenever I have to use the brakes going down long hills.

Right now I'm looking at these but I fear that even though the seller is "ACDelco" that they might be imposters or of otherwise poor quality.

I'm so sick of doing brake jobs on this thing. Can anyone recommend rotors that they know for sure aren't garbage?

Thanks
 

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Would try rock auto for genuine oem replacement, I would trust them to distribute genuine parts. Have the original rotors on our 2012 and using duralast cmax pads. Have only had to have the rears turned once, fronts have only had to be cleaned up and never turned. Have close to 170,000 miles on them and fully expect them to be ok with the next brake job. When the time does come to replace the rotors, the factory stock parts will replace them.
 

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Acdelco 1770980 is the original rotor.
Right now I’m running Acdelco 18A813AC which is a coated rotor.
I would go with the original rotor even though it is 54 bucks a rotor on Rockauto.
 

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Discussion Starter #4
04Imp38, thanks for the info.

I went looking on RockAuto, I see they have at least 3 ACDelco rotors that would fit and work:

1770980 - GM Original for $55 each
18A813 - "Professional" for $45
and 18A813SD - "Severe Duty" for $53

Since I travel a lot of mountain highways, sometimes with steep grades, I'm thinking the "severe duty" sounds better than original, and surprisingly are even a couple bucks cheaper.

Think I should go with them or will there really be any difference?

Oh, and do you happen to know which brake pads are original to this car? It's the 3.8, but not supercharged.
 

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Not sure what the original pads are, or if they are sold still, I don’t see any Acdelco’s listed as original equipment.
I run akebono ceramics on the front, they’re fine, and if your brakes are getting hot from the grades, I would run ceramic. Ceramic pads are very clean. Acdelco does have them.
On my winter car, I run semi-metallic because they warm up faster, but they also wear faster and produce some brake dust.
 
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