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hollow out the muffler
unburned fuel in the exhaust ignites
DYNO-PORT
No snowmobile in stock form can go 150 mph. Now if it is modified then yes, they can go 150+ mph
The stock exhaust diameter is 2 inches
The 1998 Arctic Cat Thunder Cat. 125 MPH stock.
Replacing your stock exhaust system with an aftermarket option is one of the simplest and most basic ways to improve the performance of your car. Increased exhaust flow not only increases horsepower and torque across the power band, but in many cases it can also improve the gas mileage. Because no internal or highly mechanical changes are made, replacing any part of the total exhaust system is as simple as removing and replacing a series of bolts.
A stock 1980 ET 250 has 23 horsepower.
Improve appearance
Look under the exhaust pipes on the clutch side of the engine.
the zrt nothin beats a triple
While stock diesel systems are very loud they are not the loudest type of exhaust you can get. To get an exhaust that is extremely loud you're going to need to go with the custom or bolt on route.