[StangSleeperGT]

I just got my Slp lm1 installed yesterday and they sound amazing, but one I hit 2000-2400 rpm there is this extremely loud noise. It only started when the exhaust was put on. Could it be a loose clamp or...?

 

[jjsg09]

It could be bumping your frame, or vibrating. Check to see if it's not touching anything underneath your car.

 

[primer2tone]

I just got my Slp lm1 installed yesterday and they sound amazing, but one I hit 2000-2400 rpm there is this extremely loud noise. It only started when the exhaust was put on. Could it be a loose clamp or...?

Yup.

 

[1lowGT]

Had the same problem. Mine was over the axle rattling on the frame