Peter Cowan wrote:

Also, Perry, what is a 9xxx? I don't see 9 in their sound level options.
Count me in for a xxx1(I'm open to pipe size).
Peter

Part #9139 is the part # written on my muffler that I had spintech build.
On closer inpection the first 9 is probably supposed to be a 3 (85-90 dB)
As for the importance of having a collector, if you do not have one I think
you should double the length of exhaust pipes from approx 31" to 62"
for our target RPM. My thinking was the integrated collector was the
best option for a compact exhaust.  I think it was an extra $100 to get
them to build the collector version.

Perry

Hmmmm. If a merge is needed for tuning and it's $100 extra for spintech to build a collector
version of the muffler, that's still a bit cheaper than buying an additonal 2 into 1 collector
made of 321 from Burns (~$150), and then putting it on a 1 into 1 muffler. Let's figure out what
we really need here. It's looking like Perry has got a valid point about the configuration of the
exhaust system.
Brian Trubee

 
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