Dr.D
Octane Boost
Well darn. I’ve been mistaken again. I feel a bit mislead by Truimph.Dr D, the "Arrow" mufflers ... are covers.
As you can see in the diagram below, number 9 is the box,.
Numbers 10, 11 & 12 are the covers.
The TFC has Carbon Fiber "Arrow" branded covers.
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I thought I read some where that the TFC has different valves (Titanium ?) and is a higher spec Engine.
This in itself would have an effect on the sound of the Exhaust.