and after unless you are trying to prove that an exhaust with a cross over section is better than one without ... a better comparison ( for power and torque ) would be to compare your car with an x / h pipe configuration to your new exhaust set up. I'm going to guess that with additional back pressure - you should experience more torque or shift the curve to the left some and perhaps sacrifice top end power a little. But it should be hella quiet as compared to what you have now or should I say had ps. - The Devils Z would still pull you on the HWY in Dallas .. maybe one day you'll be 1/2 as good as the guy who originally built my Z back in 2004 / 2005.
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