http://www.swiftsprings.net/products...r-springs.html
1) NEW 60mm 5" Swift Springs 616lb (Z60-127-110)
2) NEW 60mm (0.75" compressed) Swift helper spring 84lb (H60-060-15)
3) Used for 100 miles 60mm 5" swift spring 728lb (Z60-127-130)
Perfect springs for AST dampers on Z4M or M3.
SOLD