For all of you who are interested in these DO NOT BUY THEM!!!!! I had to take it to a well respected shop in socal and they almost wouldnt touch it couse they are bbk. read why in bolt ons 2nd page. The driver header interfears with the motor mount. needsd a dent. The passenger rest on the frame. Needs a bend. Now the x pipe needs modification couse the pretty shinny headers do not meet up where the o.e.m. did. Last but not least after all this was fixed the car was started and yes a leak. it sounded like a plane landing. when we looked at it there was a gap that i could put a stack of papers between the header and the engine. After a grind to fix that problem all is good but one simple thing. They sound like CRAP. like a gurgle or something in the header that throughs off the sound of the super 40 flows. And yes i think i still hear a leak. Well i have learned my lesson, stick with hooker let me know what you all think about this post and of other probs.