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87GNX · 10-30-2013, 02:20 PM

Mustang has a diff firing order, 4 valves, 4 cams.....if you drop in an x pipe delete the cats, the car sings at high rpm.

10-30-2013, 02:20 PM	#15
87GNX Drives: Alot Join Date: Mar 2013 Location: Norcalifas Posts: 1,336	Mustang has a diff firing order, 4 valves, 4 cams.....if you drop in an x pipe delete the cats, the car sings at high rpm.