+3 3.5" Black Stack for John Deere B 50 520 530 Two Cylinder Tractors KB-JDS-B50520530 $82.95 In stock Quantity: 1 Add to Bag Product Details Black Steel Stack for John Deere B, 50, 520 & 530 two cylinder tractors. No Muffler No Steering Shaft Dent 3.50" Outside Diameter 23" tall Please confirm base flange bolt spacing measurements before ordering.Is your bolt spacing larger? Check out our other 2 cylinder stack. Save this product for later Favorite