Bolt in the beefier Bus IRS Trans into your IRS Bug with this adapter kit (Zinc Plated). For added strength and reliability, use EMPI Chromoly I.R.S. Race Axles. Most common is 15 5/8" - your particular application will dictate proper axle length needed. (Silver Plated). Use with P/N 17-2725 Shift Shaft Coupler, T1-T2.