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I'm a bit stumped and could use some help. 2004 Mach 1 45,000 miles off road x-pipe borla catback CAI 4.30 Steeda Tri-Ax shifter custom tuned Very recently I've been getting a loud 'clack' noise from the drivers side undercarriage. It appears to happen only when weight is transfered...

I'm thinking about adding GMS 4V Pro-Series Coil Packs to my 04 Mach 1. Has anyone done this mod and what were your results? I saw a magazine write up for a stock 05 GT where they gained 30HP. Having a tough time believing that one... but if its real I'm in. My Mach has the following mods...

Does anyone know if the 03-04 Mach 1 came with a X or H mid-pipe stock?

First Time posting and would love some help! I have an 04 Mach 1 with about 30k miles on the clock. My mods are as follows: C & L CAI Borla Stinger Cat-Back Custom Tune (nothing crazy - pretty mild and set for street driving) Steeda Under Drive Pullies Short-Throw Shifter 4.30...