This is the IRS Top Gun threaded VCS shock. IRS designed their own foam cup and one piece piston. The threaded seal works so well that you can usually go for months without maintenance (and the oil usually drains clear). The spring retainer has set screws on both sides which allows the retainer to stay perfectly in line with the shock shaft. No more crooked springs and retainers! The shocks are made out of 7075 aircraft aluminum. There really isn’t much that can be improved here, so that’s why we chose IRS side shocks.  The side shock angle can be adjusted for a more linear or progressive feel using 3 different ball stud heights (medium and long ball studs are available separately).

These are sold individually.