OK, I am in need of some expert advice...So what better place to ask than here.

Here is my situation, while my 98 F150XLT is in the shop, I have the pleasure of driving a rental 2003 F150XLT with a 5.4L. I have to say that I was very surprised (actually impressed) at the throttle response of the 5.4. My 98 has the stock 4.6 with a Superchip, open K&N Filter along with straight pipes (NO MUFFLERS).

Question I have is: Does this setup actually hurt my performance or should it be helping? I have being reading about back pressure and "Y" pipes and such, but the more I find the more confused it all becomes. Some expert advice would be appreciated.

 

it might take awaya little low end torque but nothing to sh_t a brick about.

 

Lmao @ Green. It should help top end, and decrease the low end grunt a little. You will usually get better performance with a good quality aftermarket muffler though.

 

No brick sh_itt-n happening here. . Just a need for advice (of which you gave - thanks). The new cobra hood (just out of the shop today ) will hopefully take my mind of the low end torque issue, but it will be something to experiment with.

Thanks guys