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Originally Posted by 94sentragtr
Just to clear things Chimmike, I have sent a flexible home depot pipe up from the air damn to the heat shield filter. I have 2'' piping from where the cat used to be to the stock rusty muffler. I used to have a ricey exhaust but took it off due to to much noise and cop trouble. If u guys have any opinions on whats a good muffler to get lemme know. As for perfect shifts i dunno, My speedo broke about 20,000 miles ago and i didnt know what it was while replacing the clutch i found the prob and am in the process of fixing it. Damn u guys like busting peoples balls lol well thanx anyways. Hotshot headers are in the works for this summer but might get delayed due to a b13 se-r moving in.
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So now you tell us! By using the 2" pipe you've at least allowed the exhaust to increase its flow rate, but the stock muffler might be somewhat restrictive. So you opened up the volume of the piping but "plugged" it somewhat with a muffler with a low flow rate. I have a 24" free-flow perforated core glasspack after the cat, and then a Dynomax Ultra-flo muffler, which they claim can achieve a volumetric flow rate of 1133 cfm (which I cannot prove or disprove). It has increased power quite nicely, though. This combo allows for a higher flow exhaust without sounding "ricey". It's not much louder than stock.