I hate to post another thread about exhaust but i have a question that hasnt been answered yet. I would like to know which size pipe is the best for my 2001 5.4 and wether an x pipe or a y pipe will give me more performance...i am planning on doing true duals with long tubes, high flow cats, and either bullets or xr-1's but i just want opinions on the pipe. thanks for the help

 

most people here would say 2.5" for duals
as for the x and h. im almst positive the x is more for perfomance and
h is for sound.

 

It depends on if you plan for forced induction later down the road.

N/A engines should stick to 2.25 (more low end torque)-2.5 (more top end power) inch, while supercharged/turbocharged engines can go bigger.

Jarame posted a chart of X vs H pipes on a 5.0 Mustang, and the H-pipe actually made better low to mid range torque, while the X-pipe made better mid to high end power. Then Darren came along and debunked it because on F150's, the driver side pipe is substantially longer than the passenger side. So in the F150's case, the H-pipe is better for top end power, while the X is best for low end torque.

 

thanks guys that was very helpful...all in all i think i am going to go with 2.5 inch pipes with an x pipe i kinda want good low end power cus all my other mods give me high end anyway

 

Well if you want the best low end torque, then go for 2.25 inch pipes.

 

what longtubes are you going with? dynatech? oh good choice!

 

yeah dynatech what im doing...my motor is on its way out so i cant wait to put my svt 5.4 cobra with 605 hp in my truck and hopefully the headers will fit that one too...shes gunna be a sleeper!

 

x2

 

x3. Best bet.

Bullets would be affordable and loud, but XR-1s would last forever and sound incredible, but you pay for the Borla quality.. and name