Hello everyone,

I'm looking for a disk brakes with grooves for my crossfire. I would like to install ATE 24.0328-0106.1 at front side and ATE 24.0309.-0114.1 at rear side, even though, I have seen that they are valid for Mercedes Benz SLK 3.2L R170. I have doublecheck the dimensiones and they are the same in the crossfire.
Does the disk brakes are valid for both models? Any recommendation is welcome.

Many thanks

 

I personally wouldn't screw around and spend the $ on any grooved/ventilated/drilled discs. Unless you are racing your XF on a track and need that added cooling that ventilation offers because you push the brakes to the point the rotors are glowing and the pads are smoking and stinking all you are doing is actually doing using those vented rotors is reducing braking ability by reducing the disc surface area your pads connect with and you are grinding down your pads that much faster as they scrape across those silly groves and ventilation holes. But, they do look cool so to each their own.

 

Good advice.

 

Fire slots actually do offer a discernable improvement for high performance driving, on or off the track. Cross-drilling looks neat, but if the rotor was not cast with the holes, then it is asking for cracking troubles. Most of the performance brake sites you visit will educate on these two methods, and then also tell you that the industry is moving away from holes, but sticking with various fire slot groove schemes. Most of the cross drilled rotors out there are done that way for aesthetics. For the fire slotting, usually the simpler the groove, the more effective, but aesthetics matter, and people do like the various curved and shaped grooves. I prefer straight 45° slots, but opinions are like...

Fire slotting will improve braking performance, but be aware that they WILL increase brake dust and noise. The noise comes in the form of a groaning/whining sound when you apply moderate to firm pedal pressure.

Also, to best take advantage of having slots, you will want to upgrade your pads. There are many out there. For good street braking, Hawk HPS pads seem to work the best, but also produce a LOT of dust. I am currently using EBC Yellow Stuff pads on our Crossfires, and while dustier than the stock pads by a long shot, they also offer a good cross between performance and noise. Oh, yes, when you step it up on pads, expect a lot more dust and expect brake squeal. It's part of the package.

I have no measurements of how much the pads improve things, but it is readily apparent to even a novice driver what difference a good set of performance pads makes over just about any regular OE replacement pad. If you have fallen for the marketing glitz of ceramic pads, moving to the Yellow Stuff will be a night and day difference.

 

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I've never had a dust or wear problem with slotted rotors & ceramic pads (only ceramic pads on my Crossfire though). Those two combinations would (IMHO) provide the best braking and temperature dissipation available for harder than normal road (and) spirited braking. Many options are held high in opinions for a variety of reasons, so I would just throw this out for your edification. Good luck!


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The oem pads were way too dusty and ceramic can squeal and wear the rotors. Have been happy with the signature pads for many, many years. No, I do not race it, but I do drive it fast and occasionally have to haul it down from >legal speeds.

 

Just on appearance alone, drilled and slotted rotors look very cool! I needed (or maybe wanted) to do a full brake job on my newly acquired coupe, and since I did the job myself the cost was very acceptable (I probably won't have to replace these brakes while I own this car because it'll only be driven in good weather during the non-winter months in the Northeast). From Walmart.com I paid in October $360 and a $30 mail-in rebate on top of this price for a set of 4 rotors and pads:
https://www.walmart.com/ip/Power-Sto...4420/578009511
I'm never going to be driving this crossfire with the non-turbo engine hard, so I'm not worried about how these brakes will perform (they do stop well though).
From FCPeuro.com, I grabbed on clearance brand new Budweg rear calipers at $68 for each side. And for the front calipers, I bought "new" (they look like remanufactured OEM) Power Stop powder coated red at $110 for each side.

With my other warm weather "toy" being a 2004 Dodge Ram SRT-10 with the viper engine and tremec manual transmission, these prices are cheap compared to a brake job on that truck! I put on slotted and dimpled rotors with EBC pads -- a 6000 pound vehicle with over 500hp and over 500 ft-pounds of torque. Plus there are no replacement new calipers for this truck -- have to rebuild the ones on the truck or used ones bought from ebay. (I've already rebuilt all of this truck's calipers and I wasn't in the mood to do that with the crossfire)

-jack

 

Not according to most experts on ceramic pads... One example: ( https://www.autoanything.com/resourc...ic-brake-pads/ )


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I have slotted rotors, Stoptech BBK on the front. Think of them as jewelry. Expensive jewelry. You don't need them but you love having them. If that's what you want don't let anyone dissuade you.
I'd recommend stock sizing for economy. 355mm rotors are EXPENSIVE and if you use them to the fullest, they won't last as long as you'd wish them to. As to stopping power ..... I can't say for sure. The correct brake pads make all the difference. The BBK can go longer without fade but that's rarely a concern on the street. The larger swept area makes the brakes feel better and you have better leverage. If I had to do it over I'd use stock size rotors and stock calipers with the highest temperature fluid and best brake pads I could buy. Now that I'm not racing, I love the look and love that I don't need to replace rotors or rebuild calipers yearly.
If you need proof I have some cracked Stoptech slotted rotors in the recycle pile and can take pictures. As long as your honest about why you want them, you'll be happy. If you expect huge improvements in braking distance be aware it can be achieved without a BBK or slotted rotors.

Les

 

Thank you so much for the answers and advises .
The reason that I'm looking for a disk brakes with grooves is because I eventually do a track day.
​​I prefer disc with grooves than disk with holes because the longer lifetime and the homologation needed in Spain :/.
In case of pads, the most popular in Spain is Ferodo DS2500, but I'm going to install EBC pads yellowstuff in front side and redstuff in rear side. Honestly, I have never tried redstuff pads in the rear side, I have always used yellow stuff in front side and original pads in rear side.

 

I recommend staying with the stock rotors until they need replacing. The stock rotors will handle more heat than slotted of the same size. I've heard good things about the Ferodo DS2500's. I don't have any input on EBC pads. Use the highest boiling point brake fluid you can afford and enjoy.

Les