Do I have to scan a page from Centric's catalog to show you?

120.46064 and 65 - PREMIUM BRAKE ROTORS

121.46064 and 65 - C-TEK Standard Brake Rotors

Stoptech and now powerslot are made from 120 series discs.

The 120's cost twice as much as the 121's

Is that complicated because it seems simple to me.

 

Sorry, I didn't mean to get on a jag. But this could have ended catastrophically. Luckily I had the awareness to cut my run session short and come in to the paddock.

I had a garage bay that weekend. My cracked rotor created such a stir, that everyone wanted to come and see them. Lots of the senior instructors could not figure out why they cracked SOOOOOO bad.

 

No it's not complicated, you are making it so.

All the centric/rotorpro rotor blanks I have used are part #120.46064 (fronts)

All the centric/rotorpro rotor slotted I have used are part #126.46064 (fronts)

65's for the rear. Those are the same part numbers as stoptech (now the 11th time I have said this)

However, I think we might finally be onto something here. All the 120 and 126's I have bought have had the black hats.

I have a new set I bought from Rotorpros that are all silver and I just went down to the basement to check them (haven't installed them yet) and they are the c-tek 121.

So it looks like the all silver ones (like george3 has here) are the cheaper 121 c-teks and the ones with the black hats (like I have used on track many times) are the premium centric/stoptech ones.

Guess we need to ask for the black hat ones from rotorpros. It used to be you get them by default. Our maybe they don't sell them anymore, which would be a big bummer since it would mean we would have to pay twice as much to pad the pockets of places like EVObrakes...

 

Here are some pretty photos to solidify the point even more.

Rotorpro/centric 120.46064: (on my personal evo, notice black hats on both)

Front:



Rotorpros/centric rear #126.46065 (126 meaning slotted, 65 being rear)



Stoptech 126.46064 front:



Stoptech 126.46065 rear



Hey look, same rotors, same part numbers. (12th time saying this now)

 

 

Does anybody know for a fact that the CTEK rotors aren't exactly the same as the PREMIUM rotors aside from the black coating (e-coating) on the HAT?

The CTEK rotors are also double-disc-ground, and have a fully machined HAT. I just can't believe Centric will have two different casting process as even the Premiums (120.XXXX) are priced cheaply - around 60$ per side. I trully believe the only value add the premiums have over the CTEK's is the blingy black e-coating.

As for george3 problem, pretty sure it's rare occurance as lot of people take their centric equipped evos to the track (I believe RRE sells alot of them). Even with the best quality control, some parts will still fail.

 

It's pretty much a fact. I'm sure if I had one of each I could easily prove it.

I'd bet razorlab can see Made in China on the C-Tek and made in Taiwan on the 120 or 126 box.

Also - The 120's should be center parting line rotors - the 121's are not. You'll also see chamfers on various edges missing/not done etc - just all in all a sloppier part - they have to remove cost somewhere. That means different sourcing/tooling/machining/metallurgy and quality control

This stuff is pretty much pure commodity though - so sourcing can be quite difficult to determine and it can switch about randomly depending on who has what when it's needed.

BTW - you mention double disc ground rotors -

Your stock Brembo rotors are not double disc ground - neither are Stoptech BBK rotors - and neither are DBA rotors. Those rotors along w/ Brembo BBK discs and pretty much any other 'brand' disc I have seen are fine turned. So is double disc ground process an improvement?

List price for the 120's is $120.63/rotor each front, $84.63/each rear
121's are $62.75/each front/$45.50 rear

Nothing sells at list of course - but can you really get them for 50% off list?

These guys sell it for $98/rotor
http://www.autopartswarehouse.com/de...dot-46064.html

$89 here
http://www.amazon.com/dp/B000C02WQS?...0&linkCode=asn

You guys profit when the crap gets given away - glad my living doesn't depend on it though.

Between the 'bait and switch' of rotorpros and zero control of pricing - no thank you. For a cheap chinese rotor no less.

 

I only mentioned that because the Premium Rotors also state such (double ground + machined hats) from the description aside from the e-coating.

As for 60$ per rotor

It's being sold at Amazon.com for 60.31$ per side (120.46064) for the fronts (from the description, it says it's the premium with e-coating).

Links for the Front

The rears are more expensive at 65.18$ per side (120.46065)

Links for the Rear

I've never ordered from these people but I'm assuming the $$$ is relatively safe as Amazon is the middle man. There's a couple of different Amazon vendors selling them.

 

dayum...that's lower than my cost.

Their list price is either bogus or outdated - mine is current from Centric for 2008. I'd say if you need rotors buy them - they can't be making more than a few $$ if any at all.

although the feedback isn't great - and I didn't bother calculating shipping.

Like I said - glad it's not my livelihood - jfc I'd be broke instantly.

I like this part of the company description - lol

About PartsFactor
PartsFactor is committed to providing each customer with the highest standard of customer service with minimal hassle.

 

Bryan

You just proved what I said to be true and then insulted me publicly?

Why would you be padding my pockets? I don't even sell Centric/Stoptech/Powerslot/RotorPro/NameoftheWeek. I rarely sell anything from China or Taiwan - and when I do I decided long ago that I tell it like it is. It's a generic product w/ little or no traceability. It comes in a white box usually - and anything further than that is pretty much a guess.

This whole reach around and branding/marketing whatever the heck you call it from Centric makes me cringe and unfortunately it's wholly typical of products from that part of the world.

Seeing your older RPro parts I see why you got frustrated w/ me. I knew that RPro's started by using the 120's. I'm pretty sure those came to market before the 121's were made. (Otherwise we could be pretty sure that RPro would have bought the cheaper ones from day one)

I actually thought that was a good idea for them. Pretty low thing for Centric to do to it's dealers but that's their choice. But then I see the price go WAY down - and as I use the Centric catalog all the time - I know what they did - they switched to the 121. It's cheaper - no one will know - and they think it's a Stoptech rotor.

I simply stated that not all Centrics are Stoptech's - they are not - and you just proved it. And what appears to be the case is that R Pro's used to use the 120's (and charged accordingly) - and then when 121's came available cheaper - viola.

Hence the new 'cheaper' C-tek's you just got. Do you still think those are 'Stoptech' rotors?

Since you have both sets on hand compare them carefully. I can tell you that they are approx. 50% different in price - the 121's are half that of the 120's.

Turn the rotor on it's end and look specifically at the cooling vanes. If you know what a parting line is look for it. What do you see between the 2 different rotors.

Look also at the friction plates and the uniformity of thickness. Are they the same thickness on both sides?

One thing I can 100% guarantee you. I have no motive to this other than what I showed above and you proved. If rotorpro's are saying they use the same blanks as Stoptech - but in fact they use 121's then that is NOT TRUE. The only way that would not be true is if Stoptech also switched from using the 120's to the cheaper 121's but I highly doubt that. And I don't LIKE companies that lie. Not now - not ever.

I sell ONLY brakes - and I know the industry VERY WELL. But I BUY as much other **** for my track car as you do. When i go to buy tires - I'm the same as anyone - are the xyz tires REALLY $xxx better than the cheaper $abc. Well - want some Kumho MX with 1 track day on them? Free to a good home! Are the KW CO's REALLY twice as good as Megan's? I think you get my point.

The real question is - how do those 121's work? I have no idea.

Well - we have 1 piece of evidence up above. You'll be next I guess.

Whether you believe it or not - I'm trying to look out for YOU or someone like you who might be reading this - a fellow enthusiast who actually tracks an awesome AWD sports sedan like an EVO or STi. I've seen enough billion WHP EVO/STi owners waste a track day or worse yet crash/cause injury due to being uneducated regarding the stress that our cars put on brakes on track. It's NOT a Miata - look at your calipers or George's rotors.

I also wish you wouldn't have insinuated that I am greedy - or am making **** up just trying to get sales.
-Ken

 

jesus whaaambulance... so much misunderstanding, so little actual info.

Done with this thread.

 

YOu know what I said is 100% correct - you went right to your basement and verified it.

hehe - You're the one who got snookered for $31.38 and $22.75 rotors (at my crappy Centric discount no less...)

mmmm - RotorPro's - I mean C-tek....




That's funny - the rotorpro's url is BANNED from the site.

Stand up guys for sure

try it

*******************



Let us know how they work out on track.

And while you are being really uncool towards me - I'll STILL give you some useful info to prolong rotor life.

On the street heat cycle them gently as many times as possible w/ slowly increasing intensity. This allows grain dislocations and other internal casting stresses to move about slowly and 'settle' the iron. Fast cooled high production gray iron rotors generally have a worse grain structure. This might alleviate fast fracture (think warm water poured directly on ice cube and the resultant 'pop') This is good for any rotor btw.

 

I mentioned uneven plate thickness

 

You already knew these rotors were different before I posted. You asked him if they were silver or black.
Then you proceeded to be 'surprised' that you noticed the different part number.

 

That's the 120 rotor isn't it - you said you haven't used the C-tek 121's yet.

That's Taiwans best effort btw - and look at the heavy grooving and irregular spider webbing.










The heavy grooves and irregular cracking of the rotor on top are at least from a cursory look different than the typical spider webbing observed on the Brembo rotor.