270g Round Shift Knob 2015-2021 Subaru WRXby Boomba Racing These shift knobs feature a precision CNC machined brass core for added weight as well as a delrin shell for durability, excellent appearance and temperature management. A heavier shift knob puts the weight towards the end of the shift lever. This increased momentum while shifting gives you a greater mechanical advantage, allowing for a much more positive feeling throw when rowing through the gears. The delrin shell with laser-etched Boomba logo prevents the surface of the shift knob from getting too hot in the summer and too cold in the winter. These shift knobs make a great addition to your Subaru\’s interior! Features Increased Weight Aids in Positive Shift Engagement 270G Round Design CNC machined brass core for added weight as well as a delrin shell for durability Delrin Shell Is Temperature Neutral Fully retains reverse lock out functionality Please Note: Compatible with OEM & Boomba Racing Short Shift lever Applications 2015-2021 Subaru WRX What\’s In The Box? (1) 270g Round Shift Knob