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ron717 previously said:
what about the TRD exhaust? How is it constructed, filled, etc.?
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http://www.borla.com/faqs/
The TRD is made by Borla (another good company) they also opt away from the baffle design, which looks like the Plinko game from The Price is Right.
Baffles are the same technology used in certain types of musical instruments. Basically a Baffle style muffler is more interested in the "sound" that eminates from it than the actual flow rate and scavenging properties. A properly designed exhaust has a series of negative pressure that in effect creates a suction that assists in evacuating the exhaust gases from the cylanders during the exhaust stroke (valves open up) and if more exhaust is evacuated then there is more room for the clean air/fuel mix = more HP/TQ and greater efficiency.
