I'm originally from the v8/performance crowd. A better flowing exhaust always gave me better mpg, so I would get worse fuel economy with the 4 banger
Is it a backpressure issue?
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1998 Mazda 626 DX
2.0 4 cylinder
5 speed manual
AC and PS Delete
17x7 Drag DR 19 wheels ( I know )
Hankook z rated tires ( again, I know
Future plans: Mazda miata 14'' BBS wheels
