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.

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.

Question: Has the VMAX Pitts Style Muffler been upgraded? If so, what changed and how can I tell an upgraded muffler from earlier production?

Answer: Yes in mid 2004 the VMAX Pitts Style Muffler was upgraded. These are sold as stand alone mufflers to fit most popular 46-52 and 61 size engines AND provided at no charge per various special offers.

Here is what changed: 

• The fit and finish was greatly improved.
• The production of the crankcase mounting flange was moved to an automated process to improve the consistency of flatness, fit, spacing between mounting holes and the bolt hole threads.
• A new high temperature plating process was implemented.
• The exterior color was changed from black to silver.
• In early 2005 a logo was impressed into the product.