Question brought up by "Better size header"

[budgetmaster]

I'm not usally that big a fan of the mags, but if you have noticed recently they have tested a couple of decent combo's that did not gain any power w/ 1 5/8 shorty headers over stock headers. These were not stock combos, one was a complete edlebrock package the other was trick flow intake, anderson cam and powerheads. i think for a long time you didnt see these dyno comparisons w/ the headers because the advertisers had hyped headers up so much that the mags did not want to expose the reality and lose the advertising dollars. Now w/ the 4.6 market expanding and 5.0 market saturated it's different. How many 5.0's could possibly be adding shorty headers now as compared to several years ago. Next up is throttle bodies on milder packages showing little to no gain I'd assume.