I put my first mods on my 05 ctd cc swb. I put a torque tube & a 5" magnaflow turbo back exhaust. This is my first CTD,i traded in my "hemi",and loving every minute driving a real truck now! I have an exhaust ??? After i installed my 5" exhaust my rpm shoots up very quickly now,and it feels like i lost some power! Is it possible i went to big on the exhaust?? p. s. i am a newbie and this is my first post. THANKX