I was reading a thread on a certain Altimasdotnet site about the crimped exhaust pipe at the rear of the Altima.
The guy explained that he took his car to a shop where the tech told him it would not be beneficial to remove that section of pipe. He also said that he had seen cars dyno'ed with and w/o and that it made no difference in the runs.
Now in my limited exhaust knowlege, how is that possible? I can understand how a chambered muffler is just a little more restrictive than a straight through design, but how would that crimped pipe not make a bottleneck?
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Originally posted by Slurppie if the cfm exiting the resonator is the same or less than what the crimped section can handle, then replacing it would be pointless.
Slurp.. you are right.. but if you replace the resonator and the crimped pipe with 2 1/2 inch pipe you will allow the gases to flow out freer, and increase HP. So in stock form, I would agree with you as our stock 2 inch piping is not designed for performance.
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