HP question on my 99 GT

[BackINblack99GT]

i had 260 hp on my stock 99GT i added BBK longtubes BBK catalytic H and a flowmaster Catback, i do not know around how much hp my car has now but im guessing its over 300, but i was talking to this guy about my car and he said that possibly i could be loosing hp due to not having an Cold air intake or aftermarket TB he said i am either loosing hp or not gaining the most out of my headers etc. is this true and BTW about how much do you think my car possibly has due to the fact that there are no DYNO shops near my area.

 

[stangman]

well your car isn't loosing power, but he is right about it's not making as much power as it could with intake mods. open up the intake & exhaust part & you're sitting pretty

when i had only mac longtubes & a prochamber on mine i dyno'd my car. it put out 306 flywheel hp. so i would imagine you would be in that ballpark as well

 

[Mustang5L5]

In this months MM&FF, they did similar mods to a stock '03 GT and gained 17 rwHP on the dyno.

 

[stangman]

In this months MM&FF, they did similar mods to a stock '03 GT and gained 17 rwHP on the dyno.

i gained 18 on a mustang dyno, so it would have been 20+ on a dynojet with nothing but the headers & prochamber