H&R 60mm ID Single Race Spring Length 200mm Spring Rate 60 N/mm or 343 lbs/inch - RF200060 fits_2012-`BMW`3 Series This cat-back exhaust system is

This cat-back exhaust system is constructed of 2 IN - 2-1/2 IN mandrel-bent 304 stainless steel tubing for maximum strength and durability

Direct fit over factory antenna base — no modification required

Dual Carbon Fiber Tips

This 7-1/2” tall 360-degree radial flow air filter features a 3-1/2” round flange and our oiled Pro 5R media with five layers of progressively finer cotton gauze media for maximum airflow and performance

High Quality Intake Tube Fittings

H&R 60mm ID Single Race Spring Length 200mm Spring Rate 60 N/mm or 343 lbs/inch - RF200060 fits_2012-`BMW`3 Series This cat-back exhaust system isH&R 2. 50" I. D. Race Springs are made with extremely high tensile strength wire alloy which allows the use of a thinner wire. Manufactured using advanced materials and precision technology in Germany, H&R 2. 50" I. D. Race Springs are crafted from special lightweight (hf) 54SiCr6 spring steel. For any given spring rate, they are on average 15% lighter and have 10% more travel than competitors' springs. Main springs range from 6" to 18" in length and