lexfourcam Posted January 30, 2008 Share Posted January 30, 2008 i got flo masters installed recently on my ls400 it sounds good at a low rpm but when u really smash the gas u dont really hear the exhaust u hear the engine ive been told i have a slight exhaust header leak but would that really make all the difference? Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted January 30, 2008 Share Posted January 30, 2008 Leaks can make a HUGE difference. Did you do the entire exhaust system, or just replace the two end mufflers? Any audio/video???? :) Quote Link to comment Share on other sites More sharing options...
lexfourcam Posted January 31, 2008 Author Share Posted January 31, 2008 ive just done the 2 rear mufflers and ive got custom piping from the center muffler back to them it was all done rite by this custom exhaust shop i was thinkin about headers but they cost too much. ive heard of cuttin the 2 cats on the headers off but would that really make a difference? Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted January 31, 2008 Share Posted January 31, 2008 You'd get some more sound out of it... Do they do emissions over there? Quote Link to comment Share on other sites More sharing options...
lexfourcam Posted January 31, 2008 Author Share Posted January 31, 2008 i live in FL but i dont think so. i kno its illegal but i kno quite a few ppl that have done it and i was just wondering if that would have any affect on it i guess i'll get 2 new exhaust manifold gaskets and cut those stupid cats off while i replace em Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted January 31, 2008 Share Posted January 31, 2008 Yeah the only thing that happens when you take out the cats is 1. You'll get more sound 2. You'll fail emissions But if you're in a state where they don't do emissions it doesn't matter. Don't forget to get some audio/video for us!! :D Quote Link to comment Share on other sites More sharing options...
eatingupblacktop Posted January 31, 2008 Share Posted January 31, 2008 i got flo masters installed recently on my ls400 it sounds good at a low rpm but when u really smash the gas u dont really hear the exhaust u hear the engine ive been told i have a slight exhaust header leak but would that really make all the difference? Check the manifold. If you've got a leak you'll hear the valves. Quote Link to comment Share on other sites More sharing options...
lexfourcam Posted February 3, 2008 Author Share Posted February 3, 2008 yea im gonna get that replaced but the cars also makin another noise the engine makes a tapping sound when it idles low ive been told those r the lifters tapping. is that really bad should it b fixed rite away? Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted February 3, 2008 Share Posted February 3, 2008 I think the "tick" is kind of an inherant thing to the LS's v8. or so i've heard. Not a biggie, just an annoying tick. Quote Link to comment Share on other sites More sharing options...
lexfourcam Posted February 4, 2008 Author Share Posted February 4, 2008 oh i see. thanks for all your help i thought there was nothing wrong with it my brother and his friend thats a mechanic thought it was the lifters but it couldnt because it sure did go 145 really easy : ] Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted February 5, 2008 Share Posted February 5, 2008 Haha damn!! i had my old Lex up to 100mph but I had huge 20"s and stock brakes so I decided to be somewhat responsible and slow the hell down! lol Quote Link to comment Share on other sites More sharing options...
lexfourcam Posted February 8, 2008 Author Share Posted February 8, 2008 yea i dont plan on goin that fast again cuz it was pretty *BLEEP*in scary and i realized it when i went passed somebody that was doin the 50mph speed limit Quote Link to comment Share on other sites More sharing options...
RFeldes Posted February 8, 2008 Share Posted February 8, 2008 When you put in flowmasters it's a good idea to put in a crossover as close to the headers as possible. Since you have no headers why the flowmasters? Seems redundant. Quote Link to comment Share on other sites More sharing options...
lexfourcam Posted February 8, 2008 Author Share Posted February 8, 2008 well it does sound alot better but i just ordered s&s headers that are sposed to give it 35hp. i just got one question exactly how hard is it to get those headers off? Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted February 8, 2008 Share Posted February 8, 2008 I've heard it's a pretty involved process. Quote Link to comment Share on other sites More sharing options...
new2mud Posted February 8, 2008 Share Posted February 8, 2008 i was thinkin about headers but they cost too much. The 1st gen LS has very efficient exhaust manifolds--the SC had more restrictive manifolds where headers provided greater benefit. Adding an X-pipe and free-flowing rear mufflers (like you did) should take care of most of the major restrictions on the LS. Quote Link to comment Share on other sites More sharing options...
lexfourcam Posted February 9, 2008 Author Share Posted February 9, 2008 yea so today i went and had my exhaust looked at and they said that its not a header leak its a pipe and there was gas fumes leakin out from the bottom i noticed so i got some glass packs and i got some cherry bomb mufflers i'll get some audio up of it, should sound really sick Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted February 9, 2008 Share Posted February 9, 2008 CANT WAIT!!!!!!!!!!!!! :D Quote Link to comment Share on other sites More sharing options...
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