I've been told that I might get 40hp with both these installed in my
More like 10 to 15 horsepower. Your still going through the catalytic converter right?
Headers-Yes K&N-No...but its personal preference(I tossed mine)
Go with a high flow Cat if you can in your area, and a good cat-back system. A few tweaks to the fuel injection and you will feel a difference.
I've been talked out of the headers. Was told exhaust manifold on Vortec is already almost like headers anyway, and headers always leak. Also put in a K&N filter, and man what a difference! How do you tweak the fuel injection?
I have never had my headers leak on any of my vehicles(my '85 'Burban has had em on for 50K or so)...anyway...
You could run a chip in the computer. You could go with a Holley TBI.
As for the K&N, more wear and dirtier oil are what your gonna get along with the increase in air flow...
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