The SLP (Super-Low Profile) back surprise tower accommodates the upper clamps with centering pins. Centering pins allow completely fitment of the shock towers on the upper clamps within the exact same place every time, therefore helping to eliminate tweak . CNC-machined from 3.0mm thick premium-grade graphite material to ensure maximum power and endurance. Recommended for usage with SLP shocks, specially in extremely-low traction track conditions.