XEghia

Try this oil mate. It lasts ages and is fully synthetic, been running it a couple of years now.

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Any diff oil rated for limited slip usage is fine. Used to be 85w140 when mineral was it, but now synthetics can be made thinner with the same protection. I'm sure there are LS rated gear oils at 80w90 nowadays. Thinner is better when roller bearings are involved. Better flow and cooling.
 
From memory, BW diffs take 1.8 litres.
 
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Mr Polson is on it.
Exactly what he said. I've raced tarmac a few times on DBA T2's Slotted only, with bendex ult pads. The pads ended up getting cooked but rotors survived, so they well over 550deg C. and i've swapped to a higher temp compound pad for now.
For street use. Standard bendex are easily available, and good reliable quality. You dont need ultimates or special compounds unless your racing.

Do not get crossed drilled rotors. They are for looks only.  Cross drilling atcually reduces the effectivness of the rotor as it lowers thermal mass. It also create failure points making the rotor more prone to flying to bits on the track. 

 

Cross drilled should be considered race only. You'd be lucky to get a season out of a set. Street discs will be slotted and/or dimpled. I'm surprised that DBA would still sell the cross-drilled ones, unless they stipulate racing purposes only.

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DBA slotted T2s are probably the best rotor for the street.

I wouldn't recommend Bendix ultimate for the street, they need to be warm and used hard to be effective.
Normal Bendix pads should be fine, of Heavy Duty if you don't mind some dust.

Keep searching for the slotted and dimpled rotors for the fronts as they are great, haven't had a problem with them on any of my cars so far and for the rears just go with some nice solid rotors as it usually isn't worth the extra expense to bother with fancy discs on the rear. As for pads I haven't heard anything bad about the ebc greenstuff pads personally so might be worth a look, that entire setup is what I'm planning on getting for my eb when funds allow it. Keep checking the online stores for discounts to save a heap of money too as Sparesbox and others usually have sales on brakes every other couple of weeks.

Bendix ultimate pads 
 
have these with vmax slotted discs on two ba/bf 
impressed so far