H&R 2.5 inch ID Single Race Spring Length 8 inch Rate 600 lbs/inch - R25080600 fits_2017-`Audi`A4 9 quarts over the stock

9 quarts over the stock transmission pan for more cooling capacity

The stock R35 GT-R oil cooler (p/n 21305-JF02B) retails at an astonishing $8948

These arms are designed to be used with the OEM or OEM style front lower control arms

With upgraded parts

H&R 2.5 inch ID Single Race Spring Length 8 inch Rate 600 lbs/inch - R25080600 fits_2017-`Audi`A4 9 quarts over the stockH&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