Q "Quiet" Muffler with baffle for Large Vanguard engines 
Product Number: Horizontal: A-743K Vertical: A51K
Horizontal Compatiable with MB, GT, GD, BT
Vertical Compatiable with PD, MB Sport V
20% quieter than a regular Q Muffler
Same performance
Fits large block Vanguard horizontal engines
Stainless steel construction
Excellent performance
Low, aggressive, and quiet sound
All hardware is included
Carb Jetting changes may be necessary