Perry Casson wrote:

Using the Spintech part # system as defined  by
http://www.spintechmufflers.com/spintech/styleimages/index.htm
Are you going to be making  #9137 or #9139?  From what I've read if you

do

not use collector as in #9139 has you loose virtually all gains from
attempting to build a tuned exhaust.

Perry Casson

Peter Cowan wrote:

Brian, given Perry's heads up, would you consider going to a model  xxx1
(one in, one out centered)?
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

 
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