The Rmax sheave gets really really hot, enough to melt the outer edges of my weights. My weights can handle 500F but the belts tend to explode around 250F.
2" snorkels are not enough! Come on... If a 2" snorkel is not enough on a Viking, why would it remotely be large enough on a Rmax? Yes, you are going to explode belts with 2" snorkels. If someone is selling kits with 2" tubes, don't buy it.
The way I recommend pluming it is with that thin walled 3-4" drain pipe you get from Home Depot and use silicone turbo elbows found on ebay. 80mm silicone tubing couplers and corners work great. A 4" tube is preferred here.
Why 3" and not two - 2" tubes? The best way to look at airflow is by the surface area of a circular opening. The area of a circle is pi x radius squared. A =πr2 So a 2" tube has an area of about 3.14sq inches. A 3" tube has 7.07sq inches. A 4" tube has 12.57 sq inches. So that is more than double the air flow. The stock tubes on an Rmax inlet is about 4" and there are two of them. So you are really just barely meeting the minimum requirements for snorkels at three inches in diameter.
(pi=3.14159265359, does not equal pie, but cherry is great)