SPL Parts Swift Assist Springs 65mm Spring Rate 223 lbs/in (SWIFT-A65-040) _D915 Part number 140840CF includes AFM

Part number 140840CF includes AFM valves but does NOT include NPP dual mode exhaust valves

this delete pipe provides a powerful exhaust note

and it features the same great durability the drivers like about B&M

12 ohm coil resistance

engineered and manufactured in Costa Mesa

SPL Parts Swift Assist Springs 65mm Spring Rate 223 lbs/in (SWIFT-A65-040) _D915 Part number 140840CF includes AFMAssist Springs Get the best of both worlds, Swift assist springs provide a dynamic step linear rate. Like our helper springs, the assist springs are designed to be fully compressed at static height. Every one of our assist springs compress to the exact same height. This allows drivers to change assist springs without resetting the perch on the coilovers so the ride height isn't affected. Heavier rates of assist springs over helper springs are used to