Stock Exhaust Design Comparison

[marquezkevin]

The first picture is from our t135 here in the Philippines (T135-HC 2S6) while the other one (2nd picture) is from Thailand (T135FI SPARK RX135FI(2S51, 2007))
Question:
1. What is the purpose of the encircled part of Fig. 2 - Exhaust Design B?
2. Does it contribute to motorcyle's performance or just to reduce emission?

Ideas, comments, and suggestions are very well appreciated. Thank you in advance.


Fig. 1 - Exhaust Design A

Fig. 2 - Exhaust Design B


Fig. 3 - Additional pic

 

[jangbest]

watch mode

 

[linjunvelasco]

i noticed rouser 135 also has part like that in their stock pipe

 

[ronald031803]

catalyser,,,, inside of that is 3 small tube,,,with doted holes on side

 

[jomarespedido]

watching...

 

[zcbitik]

I guess sir @ronald031803 is correct.. here is the definition of catalytic via wiki :

A catalytic converter is a vehicle emissions control device that converts toxic pollutants in exhaust gas to less toxic pollutants, by catalyzing a redoxreaction (oxidation or reduction). Catalytic converters are used in internal combustion engines fueled by either petrol (gasoline) or diesel—including lean burn engines.

cage on japan uses catalytic to control pollutants, I don't know on other country, but in PH other doesn't use it, this is to lessen the cost of a car on PH market, I don't know if all new car on PH uses this too now, btw if you are a racer, drag or circuit, it will not help because it will control the flow of you exhaust.. guru's correct me if I am wrong

 

[sniper135lc]

because it is EFI this was the sensor chamber to analyse the mixture of gasoline and air and it will reflect or send data on the ECU to adjust the sprinkle of fuel.