I have M-Tech 1 and there are square holes about 3" or so, about 18" from the brakes. Do I have to remove the hubs to change the plates?
I would think it could dramatically help track braking, even for driving schools.
Companies make backing plates that allow you to install and remove them without taking the hub off. You'll have to cut your OEM backing plates off. I do suggest being careful when you do so because the ABS sensor and tooth wheel is under there. If I was doing it, I'd just go ahead and remove the hub (the hub and bearing is all one unit) and install a new one on each side.
I was thinking the same thing, at 105k miles it may be a good idea to do front wheel bearings anyway. Is it pretty easy considering I do have the proper torque wrench, I think all I need (that I don't have) is a 46mm thin walled socket?
Oh also should mention, I still drive this car part time on the street, perhaps 5k miles per year. Is this a bad idea for street driving?
I drive with mine on the street, full cooling ducts, hose and backing plates. No issues so far. Its not a 100% daily driver so if I know there is going to be a deluge of rain, I don't take it out, I just drive my truck. I had a shop install them so can't comment on that piece but MrShelly already weighed in so you already have great input there.
If you change the hubs, I suggest new dust caps and nuts. As for a socket, a 1-13/16" works just fine. Sears has them. You might need to buy a 3/4" drive breaker bar. As for tightening it (and taking it off) I just use a jack handle on the end of the breaker bar.
I just run the Turner ducts for the bumper (the CF ones that work on an M3) and have backing plates I made up many moons ago (they require the hub to be removed if I need to take them off). As long as you get some air pumping through those rotors, you'll be set.
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