Stoptech Street Performance Pad (Front) Review

Helo58

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I know that there is a lot of discussion about the brake pads and rotors on our Stinger GTs equipped with Brembos. Regardless of where you stand on this issue and potential causes, I think that we can all agree that replacing the pads is the simplest solution if you are having issues. A pad upgrade might be desired even if you aren't having issues. After some discussion with my local Kia shop, they agreed there was a problem with my brakes at the 10k mile mark and agreed to replace the rotors and install my pads at no expense to me.

I visited the Khartunerz website, which at the time was the most convenient source of Brembo pad replacements, and purchased the Stoptech Street Performance (now known as the Stoptech Sport Pads). The ordering process was simple and easy and the parts arrived quickly. The persuading factor in buying from Khartunerz was that they evaluated the fit on the Stinger and guaranteed that they would work for the car as these products are not listed for sale on many common auto parts websites.

The pads were installed at the dealership shop and I followed the bedding procedure below on the way home and the next day.
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SSP.webp
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During the first 10 stops, you could definitely smell the friction smell and observe the green fade. After the second set of ten stops the following day and allowing the brakes to cool back down (20 mins of normal driving with no stops). The brake feel is fantastic. The initial grab of the brakes is slightly more aggressive than stock and the ability to trigger ABS is now done with less pedal effort than before. This suits my driving style and poses no problem to me because the brakes are far more progressive in feel than the stock pads. There is an equal rise in braking force that is linear to pedal travel. The stocks brakes seemed to feel progressive under light loads but required more pressure during more aggressive braking. The Stoptechs are linear throughout the braking range. As of now, no associated noises from the brakes, so that is good also.

Once thing that concerns me is that the pad is listed on Khartunerz website as a ceramic pad. However, Stoptech and others list this pad as a "para-aramid composite" with no mention of it being a ceramic compound. I have seen some sources that show there is, in addition to the para-aramid composite materials, some steel/iron content, but far less than a traditional "semi-metallic" pad. It should have a minimal affect on visible dusting and corrosiveness, but I will keep an eye on it in the coming miles. I have contacted APC to get their feedback on the above points and will post back if/when I hear from them.

As of now, I highly recommend this replacement brake pad for the Stinger GT and look forward to replacing the rears with the same compound once it becomes available.
 
Good news to hear! Maybe they will have their rear pads out soon so you can have a full set.
 
Thanks. Interesting that you mention the initial grab is MORE aggressive - I feel like my stock brakes already have VERY aggressive initial bite. But then again, I haven't had much time to test them out..
 
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I'm running the same pads, and they definitely perform better than the stock pads do. I replaced them with new rotors in place of warrantying the factory pads/rotors to avoid the same vibrations in the future.

The only con to this set is that they will give off the dreaded "Brembo squeal" at light braking every so often. Anyone who has owned a vehicle with Brembo's before the stinger will know what it sounds like, and that its a minor issue at most.
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
do you have link ? how much were they ?
 
As of now, no associated noises from the brakes, so that is good also.
The only con to this set is that they will give off the dreaded "Brembo squeal"
The Stinger manual "warns" that this "rrrrr" or "screeching" sounds is normal if it occurs. If. I've never heard anything coming from my brakes. So I am even less inclined to muck with what ain't broke. I've never felt like the OE brakes are in any way inadequate; quite the opposite, in fact. But when I finally do replace the pads I will be getting something more aggressive. Thus, I subscribe to this brakes thread too, and await further updates on the subject. :)
 
The Stinger manual "warns" that this "rrrrr" or "screeching" sounds is normal if it occurs. If. I've never heard anything coming from my brakes. So I am even less inclined to muck with what ain't broke. I've never felt like the OE brakes are in any way inadequate; quite the opposite, in fact. But when I finally do replace the pads I will be getting something more aggressive. Thus, I subscribe to this brakes thread too, and await further updates on the subject. :)


99% of us aren't replacing them due to "performance" per say, but rather due to a defect in the pads that causes vibrations, a defect that has to do with the compound of the pads themselves. If you haven't experienced it yet, it's only a matter of time, and while KIA seems to think replacing rotors is the route to go, it only Band-Aids the problem until the pads leave deposits behind and cause vibrations again. These pads remedy the issue all together.
 
99% of us aren't replacing them due to "performance" per say, but rather due to a defect in the pads that causes vibrations, a defect that has to do with the compound of the pads themselves. If you haven't experienced it yet, it's only a matter of time, and while KIA seems to think replacing rotors is the route to go, it only Band-Aids the problem until the pads leave deposits behind and cause vibrations again. These pads remedy the issue all together.
Pushing 22K miles here. I don't think I'm going to get vibration. If I do, I know what to get. Thanks to you guys. :
 
Started feeling the vibration at ~14k miles and went the stoptech pads route on the OEM rotors. It is much better, both with the vibration issue gone and the better "bite". It now feels like brembos...Will see how this goes for the next 3k-5k miles before making a jump to replace rotors. Feels great now...
 
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From interior to exterior to high performance - everything you need for your Stinger awaits you...
Well, I am back to looking at new pads. These Stoptech Street Performance pads that I have have a horrible tendency to stick to the rotors when they get wet. After driving in the rain or washing the car, the pads will be stuck to the rotors the following morning so bad that A LOT of pad material transfers to the rotor. It is so much that you can see the outline of the pad on the rotor very clearly. It looks like I will have to go to another pad. I'm currently considering the Hawk HPS Street 5.0 pads.
 
Are they Hawks semi-metallic? I have heard good things about them.
 
Well, I am back to looking at new pads. These Stoptech Street Performance pads that I have have a horrible tendency to stick to the rotors when they get wet. After driving in the rain or washing the car, the pads will be stuck to the rotors the following morning so bad that A LOT of pad material transfers to the rotor. It is so much that you can see the outline of the pad on the rotor very clearly. It looks like I will have to go to another pad. I'm currently considering the Hawk HPS Street 5.0 pads.

Interesting. I have about 1k miles and about 4 car washes, since I installed my new disks and front Stoptech pads and have not had this problem.
 
Well, I am back to looking at new pads. These Stoptech Street Performance pads that I have have a horrible tendency to stick to the rotors when they get wet. After driving in the rain or washing the car, the pads will be stuck to the rotors the following morning so bad that A LOT of pad material transfers to the rotor. It is so much that you can see the outline of the pad on the rotor very clearly. It looks like I will have to go to another pad. I'm currently considering the Hawk HPS Street 5.0 pads.

Are you on original OEM Rotors?
 
Well, I am back to looking at new pads. These Stoptech Street Performance pads that I have have a horrible tendency to stick to the rotors when they get wet. After driving in the rain or washing the car, the pads will be stuck to the rotors the following morning so bad that A LOT of pad material transfers to the rotor. It is so much that you can see the outline of the pad on the rotor very clearly. It looks like I will have to go to another pad. I'm currently considering the Hawk HPS Street 5.0 pads.
I've not had that issue with both the oem rotor and now the R1 crossdrilled rotors....
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
Are they Hawks semi-metallic? I have heard good things about them.
Yes, the Street 5.0s are semi-metallic and very dusty. They worked great on my last ~4000lb sedan with Brembos... well, except for the dust. Not crazy about that. I am still on the Stoptechs and have done some "extreme" braking to get the deposits off and it is good for now... until it rains again or I wash my car again. It is hard to believe how much transfers when they are wet. I have had cars "pop" and release clean but the current one leave an imprint of pad material in the shape of the pad. It is crazy and I will get photos next time if it happens again.
Interesting. I have about 1k miles and about 4 car washes, since I installed my new disks and front Stoptech pads and have not had this problem.
I hope that you never get it! Did your rotors sit wet or did you drive after the car washes? I have washed a couple of times with no issues but I drove within an hour after the washes. It seems to be bad if it rains and then sits for a day or two.
Are you on original OEM Rotors?
This is my second set of OEM rotors. I am currently on the OEM rotors and Stoptech Street Performance pads.
I've not had that issue with both the oem rotor and now the R1 crossdrilled rotors....
Are you on the stock pads? I'm glad that you are not having issues. I have been doing some reading on other forums and this really doesn't seem to be that strange with certain rotor and pad combos. What confuses me is why some have it and some don't with all other things being equal.
 
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Yes, the Street 5.0s are semi-metallic and very dusty. They worked great on my last ~4000lb sedan with Brembos... well, except for the dust. Not crazy about that. I am still on the Stoptechs and have done some "extreme" braking to get the deposits off and it is good for now... until it rains again or I wash my car again. It is hard to believe how much transfers when they are wet. I have had cars "pop" and release clean but the current one leave an imprint of pad material in the shape of the pad. It is crazy and I will get photos next time if it happens again.

I hope that you never get it! Did your rotors sit wet or did you drive after the car washes? I have washed a couple of times with no issues but I drove within an hour after the washes. It seems to be bad if it rains and then sits for a day or two.

This is my second set of OEM rotors. I am currently on the OEM rotors and Stoptech Street Performance pads.

Are you on the stock pads? I'm glad that you are not having issues. I have been doing some reading on other forums and this really doesn't seem to be that strange with certain rotor and pad combos. What confuses me is why some have it and some don't with all other things being equal.
I’ve had the stoptechs on both the oem and aftermarket rotors. The only thing w/ the stoptech and oem rotors were that it was super dusty
 
Helo,
I have heard Hawks are dusty. I have the Gyrodisc pads which are listed as semi-metallic and I am not noticing that much dust. I do wash the car every two or three weeks so I keep the wheels pretty clean. I like them, pleased so far.
 
Helo,
I have heard Hawks are dusty. I have the Gyrodisc pads which are listed as semi-metallic and I am not noticing that much dust. I do wash the car every two or three weeks so I keep the wheels pretty clean. I like them, pleased so far.
Thanks. I will keep this in mind when choosing a new pad. In the meantime, I'm finding ways to keep my car from sitting in rain. Maybe I can get some wheel covers. :laugh:

I’ve had the stoptechs on both the oem and aftermarket rotors. The only thing w/ the stoptech and oem rotors were that it was super dusty
Yeah, @Socalstinga , it is posts like yours that make me think that there is something more happening with the brakes rather than pad compound. Is the rain or humidity where you are ever high enough to rust the rotors? I am trying to get a feel for how long and how wet your Stinger brakes might get when cold and wet.
 
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FWIW, purchased 12/2017, bordering on 22,000 miles, two Midwest winters and no issues. I do garage park, but my garage is filled with salty water all winter from melting off the cars. I do believe that some of it has to do with how you use your brakes. That said, mine will be getting there biggest workouts over the next four-to-five weeks.
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
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