Finned Reservoir upgrade for shocks provides increased oil capacity and nitrogen volume. You can write a whole paper on what happens and why it improves ride quality. The basics is increased oil and nitrogen will prevent oil from overheating and provide more consistent dampening. Let's not forget the biggest reason for upgrading, provides a cleaner look! Finned reservoir upgrades start at $300 per shock and will include a full rebuild of the shock while we are in there taking it apart.