i was in need of tranny fluid so i stopped by a shop right next to where i work, i had 20 mintues to blow before work so i decided to stay. While someone was attending my tranny another guy ask me were i got my tailpipes put on, he pointed out that since my tail pipes were smaller in diameter to my muffler that i was losing horsepwer. i taught bs to myself but i always end up doubting myself..........