Hi guys,

Quick question - does anyone know what their insurer's stance is on slotted/drilled front rotors? Would it count as a modification, or is it just ignored like which brake pad you use?

I can't ask mine as I'm insured through fleet insurance - and the one and only broker we deal with wouldn't know/draw his attention to my car.

Im thinking of getting some RBA slotted and drilled front rotors - any advice would be appreciated, can't afford the money to go to ralliart/awd rotors. Thanks!

Not too sure, I'm insured with Shannons and they didn't count it I don't think.. I got slotted front RDA rotors..cross drilled and slotted are a bit hardcore seeing as they can crack from heating up too quick, I've heard that with some brands have to warm them up before doing any big braking which is why i just went slotted.. easier and cheaper. I'd get slotted fronts and rears before getting cross drilled and slotted at the front. If you desperately want cross drilled try dimpled rotors, they obviously dont all the way through as cross drilled, I think EBC do dimpled rotors.

Oh and its DBA (Disc Brakes Aus) and RDA (Rotor and Drums Aus)

I've got "upgraded brakes" listed on my insurance policy with Just Car. They didn't care what kind they were...... I just mentioned them, and thats what they put on the policy. I can't see it being the kind of mod they would void an insurance policy over - based on the fact that they actually make your car safer....... having said that, I don't think I'm saving any money on insurance by having them listed - so if thats what you were thinking...... you can pretty much forget it. They don't turn billion dollar profits by being reasonable.

If you don't list them - I reckon as long as the car is roadworthy brake wise, they won't care in the event of an accident. Having said that, they won't be covered for repair / replacement either.

the insurance company probably wouldnt like it, simply because the factory brakes on any car should be sufficiant enough to work with every day driving. so they might see it as this person drives in such a way where the standard brakes arnt sufficient enough so they are a bad driver.just a thought.

as BB said, they dont make huge profits being reasonable.

simple, call them and ask.

As for drilled and slotted. Drilled ones are prone to cracking as they heat and cool very quickly.

simple, call them and ask.

As for drilled and slotted. Drilled ones are prone to cracking as they heat and cool very quickly.

i hear everyone saying how they're prone to cracking, but has anyone actually seen a cracked rotor?

my mate has had crossdrilled DBA's on his rx7 for 3 years now, and he does a bit of track work....no problems. They have a lifetime warranty anyway so if they ever do crack, it gets replaced.
You gotta remember brake rotors arent made of glass they wont crack just from heating/cooling unless u get them upto 900degrees then drive through a river or something.

i hear everyone saying how they're prone to cracking, but has anyone actually seen a cracked rotor?


I've had DBA drilled's on mine for over year. They've had their fair share of heavy braking, I've never done any special 'warming up/down' before or after heavy braking sessions.

It never ceases to amaze me how quick people with Stocko magna brakes are to bag drilled rotors :nuts: .

I've had DBA drilled's on mine for over year. They've had their fair share of heavy braking, I've never done any special 'warming up/down' before or after heavy braking sessions.

It never ceases to amaze me how quick people with Stocko magna brakes are to bag drilled rotors :nuts: .

Exactly, considering stock magna rotors are horribly prone to warping and problems.

simple, call them and ask.


Can't directly, my current insurance is through fleet insurance with a broker (I've never actually spoken to anyone from the actual insurer), and the best the broker says is "so long as you can get brand x's engineer to say that they were designed for the car, no worries".
Ill try and cold call NRMA etc this weekend

do an online quote on their website.. one quote with the upgraded brakes, one without

I thought that they would encourage upgraded rotors. If they just see them as a performance mod, that sucks.