amoras Posted August 7, 2013 Author Share Posted August 7, 2013 I´m 99% sure that a header 4-2-1 it will give you more power in low end and the 4-1 it will produce more power in high end, (top speed)... But in this kind of motors d15z8 top speed don´t exist... lol If you what change the header from the d15z8 to a d16z6, it will remove the cat and give you a little more low end power... more then that swap engine or turbo... Quote Link to comment Share on other sites More sharing options...
Paulvti Posted August 8, 2013 Share Posted August 8, 2013 4-1 torque, 4-2-1 horsepower These are the main benefits from the different designs, both will do the best of both worlds but work more towards one than the other Quote Link to comment Share on other sites More sharing options...
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