Straight piping vs S-flow piping

[donCityZ]

b00n,

sorry to dig up old threads..

so in my case, if i maintain original stock piping size and routing,
change to straight flow muffler should be best right?

im using 4-2-1.. no cat.. stock muffler .. 0-80km/h ~ 7-8 sec.. but 80-100km/h
becomes so sluggish and made the whole 0-100 11.5sec.

 

[b00n]

can't really give advise on that though...
it's my own personal experience which some ppl might disagree...
anyway, your car auto or manual? It's highly recommended that auto use S-flow where else manual use straight flow.

 

[donCityZ]

mine AT

but somewhere i read that Sflow is same as stock muffler..
then what is the point of changing?

sorry noob here..