difference us db sound la...cos the s flow is bend inside..hence the name s flow..straight is straight la. :) personally i think the s flow would suit auto cars beter.evoX2 said:but there is no picture to explain...so still cant understand what the difference...
2zzge said:some automatic transmission recon car i saw came with exhaust as well which is not S-flow
if auto car really suit s-flow why when the japanese modify the car never use s-flow?