If you take out the sound resonator from the TRD
exhaust,you will get a louder noise from it.Exhaust Resonator:
Internal combustion engines usually make a lot of noise while they are running, and this noise can be annoying and exhaustive to your ears, especially when it is heard for a long period of time. Thus, mufflers were created to reduce the noise generated by the exhaust system. Exhaust resonators, meanwhile, further reduce the noise by making sound waves that cancel noises out.
There were only four different model numbers for the TRD
Sport Mufflers (aka by third-party venders, the "TRD
Performance Muffler" or "TRD
Performance Exhaust system"):
'00-'05 Celica GT:
PTR08-20000-08 Muffler for use with extend tip for use with rear valance (such as TRD
'00-'05 Celica GTS:
PTR08-20000-07 Muffler for use with extend tip for use with rear valance (such as TRD
The extended length variation was recommended for persons with body kits installed. It is what I have on my Celica.
The main exterior differences between the GT and GTS TRD
mufflers are the piping locations and the hanging bracket location. TRD
Exhaust systems are "bolt-on" replacement exhaust parts.
Other than the HANGER positions and the length of the exhaust TIP, all four variations are basically the same for output.
Kazuma exhaust (aka "TRD
Racing exhaust) is basically the same thing as the standard TRD
version, except it has the resonator lessened/removed, and because of this, your engine does not work as hard to push out its exhaust, and you have more power... and noise (the sound makes it not street legal in USA -- for off-road use only). Its the difference between 12hp (TRD
) and 14hp (TRD
Kazuma), IIRC. Something very minor. There are numerous posts regarding this very same topic.https://www.celicahobby.com/forums/...exhaust-facts-and-misunderstandings.html