The 2146Q2MAX kit uses a 1" anvil socket retaining ring kit which needs to be requested as stated below in my advisory. That kit does not have the custom made air motor gaskets I include with this kit.
INGERSOLL RAND 2146 TK2 TUNE UP KIT+REV VLV+TRIGGER+BUTTONS 2146Q1MAX, 2146Q2MAX
261 TK2 INGERSOLL RAND 261-TK2 CUSTOM TUNE UP KIT FITS EITHER 261 OR 271 TOOLS
INGERSOLL RAND 261 TK2 TUNE UP KIT 9945=261-TK2
INGERSOLL RAND 2146-638 HAMMER CASE SCREWS 1 PAIR: 2146Q1MAX, 2146Q2MAX SERIES