H&R 60mm ID Single Race Spring Length 40mm Spring Rate 30 N/mm or 171 lbs/inch - ZF040-030 fits_1997-2001`Lexus`ES300 Includes OEM-quality thermostat housing

Includes OEM-quality thermostat housing

To finish off this exhaust are dual

CNC Machined Front Sway Bar Ends

Over-voltage and over-discharge protections

H&R 60mm ID Single Race Spring Length 40mm Spring Rate 30 N/mm or 171 lbs/inch - ZF040-030 fits_1997-2001`Lexus`ES300 Includes OEM-quality thermostat housingH&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