Theoretically, if someone were to add the usual bolt-ons: CAI/K&N Air Filter combo, X/H Pipe catback with dual Flowmaster 40's, and get it diablo tuned what sort of HP gains would you expect on a 05-06 4.0 v6? I know a lot of products are hyped up, and you won't even get a fraction of what they advertise.. but anyone with any of the following mods plse let me know if there was a significant increase.

I figure if I can get 20-30 HP out of the above it's worth the money, if it's not significant I mine as well save up for a S/C...

 

with CAI, Magnaflow single axle back and a good tune I put down 194RWHP vs about 170RWHP stock.. I've got the automatic so there was a HUGE gain in torque.... Here is the dyno showing a stock v6 auto vs mine... Notice how nice an flat my toque is...

 

You might also want to consider a larger MAF housing and a high flow throttle body to allow for maximum airflow into the engine. With The mods you have listed, you should get around a 20 rwhp boost, I wouldn't expect much more, also this depends on how you tune your car with your diablo tuner. Don't forget to look into size reduced underdrive pulleys, these alone will free up around 10 rwhp. Later you need to consider getting a larger set of gears and a rear wheel differential. This will allow you to transfer more of you engines hp to the rw. See your car does have 210 hp, off the flywheel, but unfortunatley looses much of that hp to the pulleys, and your gears, that's why you wind up with about 170 rwhp.

 

where would you go for a larger maf and throttle body? all the TB's i have seen are for the GT.

 

Sorry dude, don't think your year has a MAF, and high flow throttle bodies aren't out yet, well as far as I know, but rpmoutlet has tons of stuff for the 05 and 06 stang so go check them out, wait a little longer and more stuff will come out. Also, when throttle bodies do come out, don't look int a throttle body spacer, from what I've been told they dont work and they cause instalation problems for a cai, well thats for 94-04 anyhow.