Originally Posted by
Snoopy
sorry but no header is going to give you 10-15hp gains unless you go with a big money custom piece like rmf or smsp. a dc or greddy you can expect maybe 4-5hp. get whichever one you like the most and can afford, they both do the same thing.
And thats why I said depending on what you go with. And My friend got a mugen header and it sure enough gained 12 hp, but thats a more high dollar header.