Product Number: Horizontal: A-743K Vertical: A51K
QS "Quiet" Muffler with baffle for Large Vanguard engines (MB, GT, GD, BT).
Does not work with new Gatortail Z motors. the exhaust gas can melt the transmission cover.
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 and instructions are included
Carb Jetting changes may be necessary