I have heard the LM-1 with and w/o cats on an X pipe side by side, and the catless car is MUCH louder. I mean, 6 times louder. It is insanely, undrivable loud. So, if you want LOUD enough to wake up the dead, then remove the cats.
But, I would stick with the cats! OR, get an SLP X-pipe and you can remove the cats and replace with race pipes whenever you want.
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Black 2000 GT Vert: Novi-2000 with Intercooler (375rwhp @ 9 psi); Tune by Kauffmans; Roush 380R Body kit; Steeda Subframes; Steeda Strut Tower Support; Deep Dish Bullets; FRPP 4:10's; SCT 4 Position Chip with four custom tunes; Steeda CAI; C&L Pleum; BBK 75 TB; SLP Loudmouth; SLP Catted X-Pipe; Bullitt Suspension; UPR Conrol Arms; Focus Fuel Pump
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