Replacing Both Primary and Secondary on 1990C4

[c4go]

I would like to know if both Mufflers were to be "by-passed" can it still be drivable ...what are the down sides besides Noise?
Is there still enough backpressure?
Help!!!

[Britwrench]

I would only replace the rear (center) muffler with a cup by-pass pipe, otherwise it's way too noisy and resonates in the car.

[Bill Verburg]

Section	        Flow Rate (CFM)

Catalytic Converter	 442

Primary Muffler	         396

Secondary Muffler	 462

here are some #s that backup Britwrenchs suggestion