The shock has 3 attachment possibilities on rear arm

user manual

Brown/Pink 7psi Outer Spring (installed)

If you want to upgrade this kit to full PRO version in the future

choice of friction discs

Clutch Kit - Xtreme Outback Race Sprung Ceramic Incl Flywheel 850Nm KSU23515-1R Mazda The shock has 3 attachment" Xtreme Outback Heavy duty sprung ceramic kit 1R Recommended for: Motorsport Applications 1R kits are sprung ceramic single plate upgrades like seen in the "" 1B"" kits, however these kits offer even further clamping force for vehicles that have had significant performance modifications. Used regularly in motorsport applications, these kits are ideal for competition cars still used on the road (such as rally cars). Specifications: Torque capacity