EBC Brakes UPR7184 Premium Front OE Rotor Fits 03-08 Dodge 2500/3500 EBC manufacture many of its rotors in either its own sister company foundry in the UK or in Italy, all rotors are machined and finished in the UK and in the USA. Where castings or finished rotors have to be bought in to complement the range, the strictest quality controls you can imagine are applied to ensure the safety and quality of the parts we sell. There are ZERO aftermarket casting companies active in the USA much to our regret. The castings we source come mostly from our sister foundry in the UK by a large margin, then some from Italy, some from Japan, some from Australia, some from the Czech Republic and some from China. We source QUALITY parts from well known and proven vendors and we are responsible for and guarantee those parts to fit and perform as expected. All EBC Premium Discs are cast to a material strength of 150 N/m2 with a tightly controlled surface hardness variation less than 20 HB and are precision CNC machined to a surface tolerance of less than 0.05 mm. That is TWO THOUSANDTHS of an inch. For this reason EBC recommends a maximum runout of fitted rotors of 0.1 mm or .004 inches (4 thousandths) TIR which means total indicator reading on a dial gauge. Runout figures above this will lead to vibration after 3000 to 4000 miles due to what we call disc thickness variation (wearing a thin spot on the high point of the rotor as it runs off-true) which is NOT a warranty condition. So you see this is no cheap import brake disc. These brake discs have the highest integrity and product quality on the aftermarket. An OE quality replacement disc, made of the finest grade iron and a perfect replacement disc for any car. EBC also emphasises that disc must be fitted to absolutely clean hubs free of all dust dirt rust and scale and that COPPER OR MOLY GREASES are NOT used. Such greases contains abrasive particles which can cause runout being similar in effect to dirt particles on your hub.