Engines with balance shafts (India-specific) - Team-BHP
Balance shaft - Wikipedia
Amazon.com: A-Premium Engine Balance Shaft Compatible with Audi A3 A4 A5 A6 TT Quattro Q3 Q5 Volkswagen CC Eos GLI GTI Passat 2.0L Left Driver Side : Automotive
AutoZine Technical School
Amazon.com: Engine Balance Shaft, Car Engine Balance Shaft 2720301572 Replacement For C350/Clk350/E350/E3504Matic 2720301572 : Automotive