Audi S5 3.0 TFSi Quattro 350bhp 08/16- C-Hook Front Brake Discs 349mm. During checkout please include a current telephone in case we need to contact you. MTEC Brakes discs can be supplied in drilled and grooved, grooved only, dimpled and grooved or drilled only, all at the same price!Key Benefits of MTEC Discs. The grooves help deglaze the pad and prevent fade which occurs when the pad and disc gets too hot! The holes help to keep the discs cool and dissipate heat! The grooves also help to channel water away from the disc surface! They add the finishing touch behind alloys! Motorsport Tunning & Engineering Company established in 2004. We are a UK based company that specialise in the manufacturing and supply of performance brake discs and brake pads. Our discs are machined using state of the art CNC machines which ensure all designs are cut with precision.