I have a 98 F150 5.4 and am looking for added power. Current modifications include Hypertech Power Programmer and a 3 inch custom exhaust from the y pipe back. I am considering the Allen or the new Holley Thunder supercharger kits. If any one has had experience with either please let me know.

I am also considering keeping the engine normally aspirated and doing headers and gearing. Any success stories?

 

If you want power supercharge it and stop wasting yer money on false horespower claims....chips, programers and superchargers are the only things that really help the power issue....you will lose low end with headers....

 

I'm not sure this is the correct section... Are you asking about supercharging it, or programming it?