no ther is no pops and burbles with the striaght pipe .
i think the x-pipe its better with the sound and the back pressure i have some experience wiht mi m5

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[/IMG]Daddy daddy, whats that car with that huge spoiler, and white lights in the back?.....
Thats X5 son and he just kicked my ass! :
2006 X5 4.8IS
2001 M5 individual
2004 TVR Tuscan S 2004
2004 Mitsubishi Evolution 8 MR