EBCT Grooved Front Discs for Vauxhall Astra Mk5 Sport Hatch 1.3 TD 90BHP 05 > 10. Check Out Our Feedback. The dimple drilled rotor was invented by EBC back in the 90’s and has been imitated by many because of its ability to offer pad degassing without through drilling disc or rotor holes which has been shown to promote rotor cracks. The wide aperture slots on the EBC Turbo Grooved Discs actually draw cool air under the brake pad and rotor interface and help cool the temperatures of the pad contact which can shoot up to well over 1000 degrees at the very heart of the brake pad during heavy braking and can cause brake fade or loss of brake effect. These “Full Sweep” slots also help remove dirt, dust, debris and water from the braking area, but without doubt the main benefit of such sport rotors is their ability to maintain a flat and parallel pad surface throughout the lifetime of the brake pad set. Recent European R90 brake safety legislation insists on a very aggressive stress test of all replacement brake rotors. EBC rotors have passed this test and in the case of the Turbo Grooved design, the brakes were shown to run 100 degrees F cooler than non slotted rotors proving their long made claims that EBC Turbo Grooved Discs run COOLER! This listing is for a pair of EBC Turbo Grooved Front Vented Brake Discs to suit the following model: Vauxhall Astra Mk5 Sport Hatch 1.3 TD (90 BHP) – Years of manufacture 2005 > 10 For models with a BHP of 90 ONLY for models with ATE Front Calipers These are Vented Discs 4 Bolt Holes Diameter = 280mm Height = 43mm Thickness (Max / Min) = 25/23mm EBC Part Number = GD1304. Since then we have grown to become one of the largest Performance and Styling Centres in the UK, with a huge and ever increasing website, and exporting to every corner of the globe. However, our commitment to service and value has never changed. We have enjoyed such prolonged success because we deliver excellent customer service – day in, day out. Our staff are the most knowledgeable and experienced in the UK. Quotes will therefore always be for an insured courier, or tracked post, depending on the weight and value of the item. For items that are being sent within the UK via 2nd class post, please allow 3-5 days from the date of dispatch before contacting us. We will have entered an approximate dispatch time on each listing. You have 14 days from the date of receipt in which to return your item. Experienced & Helpful Staff. Designed by Jarilo Design.