Flat Wire Progressive Bump Spring - 4.5" Length | 2.3" OD | 800-1200lbs/inch 1.88" Helper Springs These G80 M3 lowering springs

These G80 M3 lowering springs help keep the car flatter through corners

Part Number: 045-163-110 B

Part Number: SST-O

this hat offers a secure feel without the need for an adjustable strap

Part Number: SBS0500 MS

Flat Wire Progressive Bump Spring - 4.5" Length | 2.3" OD | 800-1200lbs/inch 1.88" Helper Springs These G80 M3 lowering springsAn essential upgrade for performance minded individuals to maximize suspension tune ability. Discover the Swift linear round wire bump spring that are fatigue and heat resistant. Our Bump Springs come in either Round wire or Flat wire both giving you true linear rate. While our Round wire Bump Springs are SRL Legal, Built for Asphalt, True Linear Rate & Highest Travel in the Industry, the Flat wire are optimized for an even greater amount of shock