Quote:
Originally Posted by airrick
Generally 4-1 El headers are for power at the top and4-2-1 El headers are more for the mid range. 4-1 headers are for people that are actually rev their car to redline, which i dont do, alot. And i really wanted that torque dip to go away. And it has =) most people want to look at the numbers only but best comparison is to drive them.
I think his E85 % content was higher when he tuned his car. mine was at only e55. I suspect his ethanol content was higher than mine.
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Unless you have a 4-2-1 long tube header. Best of both worlds.