07-15-2012, 07:24 AM
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CC Member
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Join Date: Jun 2006
Location: Newcastle, Warners Bay,
NSW
Cobra Make, Engine: RMC . 393 Dart alloy block Stroked 351 alloy heads ..all the goodies plus a pre oiler. al
Posts: 1,495
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Not Ranked
Quote:
Originally Posted by Rob. Smith
7dB reduction is pretty good. I almost bought something similar but couldn't find any info about them; particularly noise reduction. What is the summit part number ? Did you measure from a metre at 45deg from the pipe exit ? was it at idle or drive past ?
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Were these cones the Dynatech Vortex ones / |