Brand New Weber Carb Manual. How to select, install, tune, modify & rebuild. Covers IMPE single throat. DGAV dual down-draft, 32/34 DFT, 40DCOE & R0IDA. Pat Braden has done a great jo in this Weber manual. This book is priceless when trying to trouble shoot your carburetor problem. This book covers tuning, teardown, modifications, and repair.