Short Shift Adapter Adjustable 2017-2019 Civic Type R and SiPHP INR 201 OVERVIEW 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. THROW ADJUSTABILITY The PERRIN 1 way and 2 way Short Shift Adapters both reduce shifter throw 17% 25%,