My name is Steven, i just change my engine from 4G15 to 4G93 SOHC.
Now my exhaust still maintance to stock, any my friend say that need to change bigger piping and also extrator, bullet and muffler, but i dont know what size was better on my car.
I got a bad experiance before on 4G15, i only change to straight bullet and top speed at 145km/h only, very teruk........
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