Hotchkis Sport Suspension 19121 2013+ Dodge Challenger R/T V6 Sport Coil Springs. Hotchkis Sport Coil Springs for the 2013+ Dodge Challenger R/T V6 offer a sleek lowered stance dramatically improved handling and superior driver control thanks to a lower center of gravity. Our engineers poured over computer modeling and track testing data to create the ultimate spring for V6 Challengers that improves handling while offering a sporty yet comfortable ride. Hotchkis Performance Springs were developed as a complete front and rear balanced system giving the V6 Challenger an aggressive stance and balanced handling especially when combined with Hotchkis Sport Sway Bars. Precision wound in the USA from the highest quality high tensile steel they are finished in Hotchkis durable gloss powder coat.