im looking to upgrade my pads and front disks on my legacy turbo are grooved or drilled best....................

 

If the usual aftermarket cheap tat, then they are likely to crack through the drill holes if you use them as intended. I listened to the claims of the supplier who said they wouldn't crack and two lots later returned under warranty I received a refund and scratched heads as to why they had cracked. This was a commonly used brand of aftermarket discs.

You may fare better with grooved or just plain discs.

Notably, the Porsche discs are cast with the holes in they are not drilled afterwards.

 

Cast Porsche disks still crack slightly around the holes - it just doesn't get any worse is all

Richard (who might actually have to change his disks for the first time in 18 months next season )

 

I'm running DBA drill/groove discs on rear...no cracking at all with 400bhp (apart from std clutch cracking up under the strain!). I'd go just groove to be safe and for performance though as drill only gives cooling but takes away surface area - groove cleans pads...

 

you cant beat a increase in size when it comes to brakes imo

 

And 6 pots on front. Front is area to look at most as it does most of the work. I've added cooling ducts to the rear brakes and it stops the discs going blue (this was before fitting DBA discs) - also worth a thought.