ya i know, but the front pickup is like a cow...coz maybe back pressure too much?

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Added on April 30, 2012, 6:20 pmAnd want to ask forumers, is there a way to repair the fuel meter? Because i guess all wira had this problem, the fuel meter goes down quite fast after after Mid level...is there a way to change the tank fuel detector?

Bro ... when u say about Mugen muffler ... do you realise that Mugen Mufflers are generally twin-loop design rather then S-Flow ?

Let me explain to you la .... Twin-Loop muffler is a straight flow muffler with a loop of piping to cancelling the sound pressure wave create by the straight flow ... the loop carry the sound wave from front of the muffler to the rear to have the "self cancelling" effect thus exhaust flow like straight flow but still remain silence ~

If u say a S-Flow muffler is better then a Straight-Flow , i would like to hear your explanation.... cause it just out of logic that a more restrictive muffler will work better then a less restrictive one 

Erm, my current setup are actually standard 1.6, which is 4-2-1 extractor to cat back, then a small bullet and straight flow FireHill exhaust, too loud then i change back to normal wira exhaust and the car feel 50% heavier...piping are using ori direction...i don't want to invest too much money on changing piping size and route because of the fc...further more my wira oredi makan fc like gila, full tank only go about 280-300km/h after i convert to manual, befor ethat auto only can reach 260-270km/h