on 1.6 motors you should go with a 2" mandrel bent system with a good flowing 
muffler.  2 1/4 max, but the bottom might drop a little bit, top end is good 
though.  If you put a 3" on it, you will struggle to get any acceleration.  
Turbo motors only need larger flowing systems, such as the 300Z.  
            Chris 92 classic



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