if i was to go with a header... i would try to get something tuned... otherwise, you are only going with a higher flow... if you go with a tuned set, they will follow the firing order, and each tube will be matched in length, this will help increase your low end torque... and if you do go with a header, don't go TOO wide, i would actually suggest going with the narrowest header tube that (whatever company you buy from) can supply...