back when my car was dyno tuned(a crappy one at that) car made 242hp and 266tq. this was with 200k miles. 3.4 with4*knock, 4 fwi, linda ported tb. plog , ubend delete no cat stock d/p. now, since that crappy dy no, i've added 3" d/p no cat and a 3.5 pulley vs. 3.4.... no mabe 1* kr and that s all. question is: do headers make that much more torque vs. plog and similar mods. thats roughly 30, 40 and 50lbs more with like/similar mods!!! i gotta get some freakin headers![]()