Then it must be a very BIG muffler?

yes straight flow. But no sound cancelling. Normally sound canceller wave is done by midbox. Muffler, muffles



You can use a 1.8" piping setup with a much bigger muffler s-flow without being too restrictive. You can check with specialist like everco, they do make good S-flow mufflers without being too loud.

Remember, all loud but no go is no good. it has to be efficient. Hope everyone can exchange knowledge instead of throwing harsh words. Peace

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

Well.. this is definitely good for a warning.

Just change to a bigger muffler(but not too big s-flow). Stock muffler mmg restrictive. That's why its silent. Fc depends on right foot.

Btw your car damn fast wei.

heh i actually didnt notice it until your post

Anyway, Straight can be silent " no raspy sound,only low bassy sound" ... it depending on the design,don't compare with those Kakiexhaust straight flow,their design are terrible .... try to go to Sunway and have a look around like kakimotor,N1 racing or the famous exhaust shop like JFA & Everco .... see their product and compare them with Kakiexhaust product , straight u will find the quality difference ~

There is a straight flow that can be silent like S-Flow .... it is done by welding a sound resonator between the piping and the straight flow muffler "like HKS Silent Hi-Power"

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Added on May 2, 2012, 7:36 am 1st time i heard ppl say that S-Flow are better then Straight Flow on gaining power from the engine .... he still want to say ppl noob somemore .... he should polish up his car tech knowledge in google first before posting anything here to embarrass himself

This post has been edited by Wilson13B: May 2 2012, 07:36 AM

HAHAHA, sorry...is 260km =.= using back ori s-flow muffler, my wira only can run 8.6/litre...using straight flow is about 9.5/litre... 8.6/litre is same as camry ron97 =.=

This post has been edited by wilsonwc: May 2 2012, 07:08 PM

piping too big. nothing to do with backpressure crap all exhaust shop been talking about..

try reduce piping size, definitely no problem with straight flow.
that 's-flow' and 'backpressure' is compensating your wrongly huge piping size..