Why Not K-Sport Big Brakes?

[RIĐO]

First of all D2 and K sport brakes are lower quality products but are in no way unsafe or dangerous like some forum members would like you to believe.

The difference between D2 and AP racing on the street is minimal. On the race track is where you will see difference between low and high end products where brake bias is important and where D2 disks will get warped and AP brakes will stay in good condition.

For the streets however D2/Ksport brakes are good products and they look nice and there is no reason why you shouldn't run them. If you spend ridicilous amount of money for brembos and you don't track your car you are more "stupid" than a guy buying K sport kit. Not one brake kit from D2/Ksport would be sold in EU if there were chances of brakes failing or causing any kind of dangerous characteristics.

[NoHaveMSG]

I am just unwilling to accept the amount of issues I dug up.

If the rest of EU is as easy to pass as TUV, then I would still be concerned. A lot of issues with parts like calipers are tolerancing or incorrect material choice. They don't always manifest immediately. There are better "cheap" options out there that have already been pointed out. You can buy a front and rear BBK from RR for about $2k. They are wilwood calipers.

[Tcoat]

Originally Posted by NoHaveMSG

I am just unwilling to accept the amount of issues I dug up.

If the rest of EU is as easy to pass as TUV, then I would still be concerned. A lot of issues with parts like calipers are tolerancing or incorrect material choice. They don't always manifest immediately. There are better "cheap" options out there that have already been pointed out. You can buy a front and rear BBK from RR for about $2k. They are wilwood calipers.

I have been in auto parts manufacturing with some of the biggest players in the field for 30 years now. The last 10 have been in brake manufacturing. The hoops we need to jump through for OEM certification of components worldwide are massive. There are literally hundreds of specs that need to be met and we have to meet them for every country's certification requirements. This means we just find the most stringent and meet those so all will be covered. There is a group of about 200 engineers, techs and admin at corporate that this is all they do. When we make aftermarket parts the only requirement is to make what the customer asks for. That is it. No certification requirements for countries, no reports to be made, no testing verification, no maintaining test records for 30 years. NOTHING.
I highly doubt that the low end aftermarket suppliers have the resources or desire to meet any requirements that they don't have to. Especially when nobody is monitoring their product.

[NoHaveMSG]

I'd imagine the standards you have to meet are much stricter than mine. I work in the amusement ride industry as an OEM. My toughest certification in the whole world is the state of NJ. Those guys want every damn engineering document you could think of and then some.

Before I started my current job our company president at the time decided to design his own brake caliper that we would have manufactured overseas. Lets just say he got the shape down without knowing the "whys". It yielded a functional part with lots of issues. It was one of the first things I was tasked with fixing.

[enderw88]

Originally Posted by Strife26

Mine are red cause that awesome series.blue "upgrade" (just lol).

This. Thinking about painting mine blue. Performance is fine for me, but "red" just because people associate red with Brembos is silly, especially on a Series.BLUE.

[pgranberg11]

Originally Posted by NoHaveMSG

I think the AP kit is a better option in the long run. The friction rings for the stoptech rotors are much more expensive. The AP kit also has much wider variety of pad options that are in stock.

to each their own. I'm sure AP makes amazing stuff. StopTech's friction rings for the front are 300 for both sides in total and brake pads being in stock is hard, middle of racing season right now. Stoptech uses a common pad shape with a DR21 pad shape. The friction ring is probably more expensive too because it's a bigger rotor. It has a higher thermal capacity at a 309x32mm. AP I believe is only 299x32. Now that I looked the sprint kits friction rings on their website are 190+ dollars... which makes it more expensive... but regardless...

AP racing and Stoptech is better than K-sport any day. lol

[NoHaveMSG]

Originally Posted by pgranberg11

to each their own. I'm sure AP makes amazing stuff. StopTech's friction rings for the front are 300 for both sides in total and brake pads being in stock is hard, middle of racing season right now. Stoptech uses a common pad shape with a DR21 pad shape. The friction ring is probably more expensive too because it's a bigger rotor. It has a higher thermal capacity at a 309x32mm. AP I believe is only 299x32. Now that I looked the sprint kits friction rings on their website are 190+ dollars... which makes it more expensive... but regardless...

AP racing and Stoptech is better than K-sport any day. lol

I have the Stoptech 328mm kit with the ST40 calipers and the best deal I could find on them was about 250/ea last year, it was a sale through rally sport direct so I bought an extra set just to have. The stop tech rotor is also 328X28, so it is bigger then the AP but narrower. I tend to smear XP10's with this setup still.

The ST40 doesn't use the DR21. It is the same as a Porsche 928(I think).

[pgranberg11]

Originally Posted by NoHaveMSG

I have the Stoptech 328mm kit with the ST40 calipers and the best deal I could find on them was about 250/ea last year, it was a sale through rally sport direct so I bought an extra set just to have. The stop tech rotor is also 328X28, so it is bigger then the AP but narrower. I tend to smear XP10's with this setup still.

The ST40 doesn't use the DR21. It is the same as a Porsche 928(I think).

oh. I have a different kit. I have the newly released C43 front cbk and c42 rear cbk. It's the next gen ST caliper basically. The C series uses the DR21 front and DR22 rear. That's probably why pricing is different from what I'm talking about. I think these C series cbks are supposed to be the direct competitor to AP racing sprint. my bad on the confusion!

[NoHaveMSG]

Originally Posted by pgranberg11

oh. I have a different kit. I have the newly released C43 front cbk and c42 rear cbk. It's the next gen ST caliper basically. The C series uses the DR21 front and DR22 rear. That's probably why pricing is different from what I'm talking about. I think these C series cbks are supposed to be the direct competitor to AP racing sprint. my bad on the confusion!

Yeah I have the peasant kit. I think most of my issues are pad(and driver) related. I bet that 32mm rotor cools much better and is lighter.

[pgranberg11]

Originally Posted by NoHaveMSG

Yeah I have the peasant kit. I think most of my issues are pad(and driver) related. I bet that 32mm rotor cools much better and is lighter.

They have fancy "bi-pillar" vane slots. It weighs a little less than 10lbs.

[jflogerzi]

Look at this kit. Should be exactly what you want and due to the slim calipers should fit almost any after market wheels. They have both front and rear kits. They appear to use quality materials

https://www.rr-racing.com/RR-Racing-...gt86fbk005.htm



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[Takumi788]

Originally Posted by jflogerzi

Look at this kit. Should be exactly what you want and due to the slim calipers should fit almost any after market wheels. They have both front and rear kits. They appear to use quality materials

https://www.rr-racing.com/RR-Racing-...gt86fbk005.htm

They even have orange! I have a set of stage 2 fronts and sport rears on my track car. They use wilwood calipers (which I know the OP said "look like they belong on a muscle car") but there is quality there. I love my RR Racing kit

[MaverickMonk]

Originally Posted by Takumi788

They even have orange! I have a set of stage 2 fronts and sport rears on my track car. They use wilwood calipers (which I know the OP said "look like they belong on a muscle car") but there is quality there. I love my RR Racing kit

Looks like a good way to shave 8lbs of front rotating mass for $800 and look cool doing it. That's not a bad deal for someone mostly focused on weight (autoXers etc).

[wparsons]

Originally Posted by jflogerzi

Look at this kit. Should be exactly what you want and due to the slim calipers should fit almost any after market wheels. They have both front and rear kits. They appear to use quality materials

https://www.rr-racing.com/RR-Racing-...gt86fbk005.htm



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He wants beefy 8 piston calipers and a flashy color, nothing else.