Dinan Performance Spring Set - BMW G01 X3 M40i / G02 X4 M40i E60 M5 Fin The AG treatment enhances both

The AG treatment enhances both usability and stain resistance

Sold in pairs for 1-axle

Precision fitment for BMW U10 X2 M35i & M-Sport package models

soft inner liner for wheel protection

When coilovers go on this car

Dinan Performance Spring Set - BMW G01 X3 M40i / G02 X4 M40i E60 M5 Fin The AG treatment enhances bothDinan's Performance Spring set for the G01 X3 M40i and G02 X4 M40i provides greater control over body roll by virtue of carefully calibrated spring rates. Additionally, Dinan lowers the car for improved suspension geometry and an even more aggressive stance. The Dinan springs are CNC wound with high tensile chrome silicon wire and shot peened for stress relief to last the life of the car. The increase in stiffness will reduce the rear suspension