Can someone give me a round about answer for HP gain for the following car/mods? Any positive feedback would be appreciated.

2002 Stang GT
MAC CAI
MAC Longtubes
Dynomac cats
40 series flows
3:73's in the rear

Thanks

 

15HP

 

When doing bolt ons like those.... You kinda wanna maximize air in and air out....... a Cold Air Intake will do some.... but will do plenty more with a bigger TB, and Plenty more with a Plenum....... It will also maximize your air out by pushing more air through those long tubes, hi flow cats, and flows. But yea.... around 10 to 15 rwhp like Stang Said above.

 

15 if your lucky. Without the TB/plenum upgrades and full catback you will not get the full potential of the longtubes.