big marc

so im about to purchase some pypes lt headers from brenspeed but i dont know if i need the extensions or not? is there a way of finding out if i need them or not?

big marc

and i already have the regular off road h pipe and thumper stage 2 cams.

marlinmon07

You will need O2 extensions. You will have to see if the LT kit already comes with them or not. The LT's also require a "short" midpipe crossover.....

slidai

The mid-pipes you have now are for shorty headers which will not work with long tubes. So yes, you will need them, along with the a shorter mid-pipe. I just had my pypes installed yesterday (LT with o/h H) and the extensions were a must have. This will cause your check engine light to come on (lean) unless you get a tune to cut them off.