Question: Do the VMA Pitts Style Mufflers fit all .46-.52 Engines?

Answer: No

Better Answer: The VMA Pitts Style Mufflers fit the VMAX .46PRO and the VMAX .52 PRO engines and most popular engines of this size. They do not fit some of the off brand engines that do not have a standard exhaust manifold.

Question: What are the dimensions of the VMAR Pitts Style Mufflers?

Answer: Please see the attached PDF's of the labels from the packaging. These labels contain a diagram and the specifications for each muffler. The MF126 is the 45 size muffler... the MF6090 is the 60-90 size muffler.