The Only Header Thread You Should Ever Post In

[najeezy]

alright cool. the cat im gonna get is 2.25 inlet and outlet, so i guess the only restriction im going to get is from the the transition from the headers to the cat.
and when the test pipe goes bad, there should be like a type of whisling sound? idk how to describe it, but i think i know what aznboy is talking about.

should i go ahead and replace the flex pipe as soon as i install it? or wait until it breaks (if it does), then replace it?

[NWINNIE34]

install it... worry about the leaks when you have a leak... although a certain few people had problems... they arent a piece of shit, they should work fine
worry about it breaking if/when it ever breaks

im also tryin to go with a high flow cat with 2.25" inlet/outlet and then continue with back end of my exhaust

[thisaznboi88]

its flex pipe. not test pipe. If you have an test pipe and you live in cali that automatic impounded.

But yeah I have gotten used to it. Since I have an auto I don't hear it much since I don't go pass 3k, and basically my gas milage when up since I have been scared to go WOT. Also I turn up the music and it drown it all out *well most of it*

[Bobsk24]

I used my stock flex pipe.  Got a shop to cut my stock one and weld it on my new header,  cost $20.  the annoying sound is gone.  Its been bout 6 months.

[757accord]

hey guys, as most of you know, (i think) i'm a noob to this site and what not. and i'm not 100%  sure if this has been takled about alreayd, since i'm posting at work, i don't have too much time to look around. sorries. but, i recently installed my headers from DC. the ceramic ones. took awhile, but got them in and stuff. but i've been hearing this like sound coming from underneath my car, and it's been annoying. but it's only on a cold start and if i turn the car off for like, a little bit and start back up. when it's not in motion, it's like this loud noise, mostly/closely to when you hear someone speaking on the mic and the mic/speakers make that loud annoying sound for a second. and when i hit the gas and start to drive, it then sounds like a nut of bolt is loose. i talked to Bob about it, and he said my flex pipe is bad. i checked under my car last night and look at the flex pipe, and it looked good. from what i could tell, it looked to be in fine shape and what not. question is, how do you know if the flex pipe has gone bad? does it get cracked somewhere? when i' mdriving, there's no sound. only when it's a cold start. i really hope it's just a loose bolt or something. but if you guys could gimme your input and possible solutions, i' really appreciate it. the sound is really annoying.

[slipkord]

Sounds like a loose bolt, letting exahust gas creep out. Torque down your bolts and try it again. Could be a gasket, since you said it took you some time to install, might have boogered it up. What does it sound like, tick tick tick tick? How did the welds look on your flex pipe? If it was badly welded could be the issue. Hard to tell without being there looking at it. Maybe someone else can pipe in. GL

[757accord]

no, not tick tick tick. it's more like... squeeking? it's hard to explain but the closest sound would be like.. someone dragging a huge chunk of metal on like a garge floor? like that loud scrreeeccchh. lol. but like, i rechecked the bolts from my exhaust back. i haven't checked the upper part of the header, but from what i checked the night before, the bolts seemed tight and what not. maybe i should loosen all the bolts and tighten them again? and yeah, i'll check the welds on the pipe. i really hope it's not the flex pipe though. i'd be extremely upset. took me forever to install it. but only the bottom part. it didn't fit flush and i was by myself. so i had to like, re loosen all the bolts and make it fit. but i'll try to check it agian tonight. thanks for the input slipkord. very appreciated

[slipkord]

Hmmm if it's a squeeking/metal sound that leads me to believe it's not exhaust related. You might want to check your serpentine belt. When you hit the gas does it get louder with acceleration? Sometimes when it's really cold and/or wet outside from a rain my belt will squeel for a few seconds. Just a thought.

[757accord]

no. the squeeking sound only happens when the car isn't in motion, but still on. like, car is on but not moving, like at a stop light and the squeeking sounds will start. but when i cold start it, i can here like, some sound similar to like, loose bolts starting. and when i hit the gas, it's like, rattling. loose bolts, but i checked all the bolts.. they're tight. but, idk where it could be? i haven't checked the bolts from the upper header to the lower one. but it's not a bad flex pipe? bob told me his went bad soon as he pu tit on.. but.. he said it's more than likely that. but i wa sjust tryna figure out are there any signs? like, some weird nose or something? cause once i start drtiving, all the noises stop. and even when i shut it off and like, go inside to get a soda or fill up gas, and start it back up, there's no sound .

[slipkord]

Well, I'm at a loss then. If it sounds like a loose bolt, odds are that's what it is. I'm not sure how a flex pipe goes bad, gets cracked I'm assuming? If that's the case you would hear an exhaust leak. You can go to most reputable muffler shops and they'll put a stethoscope on it and check for leaks for free.

[757accord]

yeah. i really hope it's just a loose bolt. cuase i don't  really wanna take it to the shop and what not. but thanks for the input and time man. i appreaciated it

[CrackerTeg]

Here's a suggestion. Put one side of your car on jackstands if you can't reach your exhaust with the car on the ground. Start the car while it's cold and run your hand over your exhaust, without actually touching it. If you feel any air escaping, you have an exhaust leak. The flexpipe on DC headers is a known issue. I suggest you start there.

[757accord]

like, by my muffler? or the entire piping from the cat and back? i know DC has flex pipe issues, but i'm really hoping it's not. it's just a really annoying sound that i hope is a loose bolt. i'll be checking underneath the car within the hour and let you guys know the details and what i find out. thanks for the input though guys. i really appreciate it.

[CrackerTeg]

Check up by the newly installed header. If the exhaust hasn't changed except for that, that is where you start.

[timot_one]

You may want to go to an exhaust shop to have them snoop around for the problem.