whats my Horsepower gain with these mods?

Well if yall notice, in the original post he mentions NO exhaust mods other than a 3" tip. That's why I went all smartass. With no exhaust mods, you can expect nothing. Nothing. NOTHING. Notta damn thing. You can increase the air and fuel going in all you want, but until you allow for that increase going OUT, you'll see no improvement. As stated, a 2.25 exhaust pipe will see a big improvement including all the other mods. Maybe even a 2.50 pipe. The OP seems to be cool about it, but some of the rest of yall need to suck up the butthurt. We might be smartass about it, but we're givin good advice.....kinda like sittin around the shop shootin the ****.