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Psiclne
Guest
Not to push this topic on you, but speaking from my experience with my fx, headers are a nice addition and will change the sound to be more agressive, but to unlock to true performance hfc are the way to go, as someone posted, they are the bottle neck of the exhuast system, and as for the man, well since you have headers it makes no difference if you go to hfc, test pipes are another story. For the one that know to check for hfc, they will know what header looks like. otherwise for the one who don't know they just sees that you still have your cats. the crawford hfc look like a normal cat just 1/4 of the weight and restriction. I started with a stillen intake, then stillen headers, then stillen exhuast, then crawford plenum, then finished with crawford hfc as far as being na. At each mod, power was felt, some at the highter rpm range and others on the low, but the hfc was to most noticable mod as it tied everything together. As for sound, it is deeper and louder, so if you have a good exhuast it just makes it sound even better. But if you decide to just stick with headers you'll still have fun and when the itch to have more power comes you have a quick and fairly inexpensive mod for the power/performance gain, cause the next level after that would be to go FI, and as you know it's not cheep.
Thanks for the heads up. I'll look into some HFC's......any particular brands that work better than others? What should I look out for?