BMW 3 Series Saloon E30 Saloon 316 318 318is Prosport 40/35mm Lowering Springs. A Prosport Lowering Spring Kit to fit your 3 Series Saloon E30. 316 / 316i / 318i / 318iS.Not suitable for Estate models. These Prosport Lowering Springs are designed to fit on to the standard (OEM) top mounts and/or spring seats. TUV Quality Certificate Number: BM002.