Which one is worth for power and clearness? does the LT makes big diff?

 

all depends on what ur gona do and what ur lookin for. if your gona let the stock 5.0 with some bolt ons and don't wana dickwith new h pipe, shorty equal lengths will def at some sound and low end power adn little torque. If your gona mod the motor up, def. go with the longtubes. do a little research though because the tube diameter for your application and collector size will greatly affect where your torque is and such, so depending on your horsepower goal, where you want your torque, choose wisely.

 

I 'd do 1 5/8's lt's for a stroker

 

Longtubes is what I prefer.

There is a time and a place for a shorty header for some builds.