I'm running stock exhaust on my camaro. Since I can't afford a full exhaust at this time, I was wondering what would happen if I were to install a dump before the cat. Besides being illegal. Will the car gain horsepower or could it be possible that the car might loose power.

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92 camaro RS 305tbi
hypertech thermomaster chip and 160 stat
accel racing wires
accel supercoil
accel cap and router
splitfire plugs