17-21 Honda Civic Si/Type-R 2-Way Adjustable Short Shift Adapter by Perrin The PERRIN Short Shifter Adapter reduces shift knob travel between gears and makes your shifts feel solid and positive. Changing the throw and feel gives a rewarding improvement every time on your daily commute, or on the track. This should be one of the first parts you install on your car to improve your driving experience. Features Throw Adjustability: The PERRIN 1-way and 2-way Short Shift Adapters both reduce shifter throw 17%-25%, cutting the distance you must move the shift knob to enter the next gear. Knob Position Adjustability: The 2-way adjustable version of the PERRIN shifter adapter additionally allows the driver to adjust the resting knob position forwards or backwards. Easy Installation & Adjustment: Simply loosen the set screws, adjust the adapter position and re-tighten. It’s that simple! Quality Construction: The PERRIN Short Shifter Adapter is machined from a single piece of stainless steel, giving you a lifetime of corrosion-free performance. Please Note: Reduction in throw varies by Civic model. Applications 2017 – 2021 Honda Civic Si 2017 – 2021 Honda Civic Type-R What’s In The Box? 1 – Short Shift Adapter 2 – Set Screws 1 – Allen Wrench Stickers Instructions References Installation Instructions Warranty Perrin Worry-Free 5-Year Warranty