jetman2
Parking Attendant
Posts: 25
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posted August 30, 2006 10:19 AM
A 4 into 1 system is similar to the factory header but usually without the crossover pipes between cyclinders, and goes to 1 muffler instead of 2 like stock...... the 4 into 2 into 1 is pretty much like it sounds. 4 cyllinders are headered down to 2 (usually 1&4, and 2&3 then from those 2 collectors to a single outlet (muffler). Supposedly there is a little better exhaust scavengin with the 4-2-1 as opposed to a straight 4-1, but that is usually a design issue from the pipe manufacturer.
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Black 2006 ZX-14
  
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