3 small Cracks on my exhaust manifold

[amskater]

today I took off my heat shield and noticed 3 small cracks on my exhaust manifold. Do I need to get this fixed right away? am I losing any power or anything.

 

[turbolover10]

Are the cracks going all the way through? I would suggest a new manifold or at least repairing that one.

 

[Locke]

I would recommend getting it repaired, but there is no rush. The greatest problem with this will likely be unwanted noise. If the cracks are large enough, you can get fresh air in the exhaust system pre-o2, which will cause you to run rich. Small cracks turn into large cracks though, so when you do get it repaired, make sure the cracks are stop-drilled prior to being welded.

 

[amskater]

I would recommend getting it repaired, but there is no rush. The greatest problem with this will likely be unwanted noise. If the cracks are large enough, you can get fresh air in the exhaust system pre-o2, which will cause you to run rich. Small cracks turn into large cracks though, so when you do get it repaired, make sure the cracks are stop-drilled prior to being welded.

would I just be better off if I got a 4-2-1 header? or should I get it fixed or get a new exhaust manifold?

 

[Locke]

An aftermarket header would be more expensive than having your factory manifold repaired. If you want something that may add power, get the 4-2-1 or 4-1 header. If aextra power doesn't matter much to you, save the cost and have your factory manifold repaired.

It's really up to you.

 

[VelocitàPaola]

Repairing the stocker? I wouldn't even bother. Those things are a dime a dozen on eBay or the classifieds section, sometimes for as little as $5.

 

[amskater]

An aftermarket header would be more expensive than having your factory manifold repaired. If you want something that may add power, get the 4-2-1 or 4-1 header. If aextra power doesn't matter much to you, save the cost and have your factory manifold repaired.

It's really up to you.

how much extra power would a header add? I have also read on the 4-1 header you lose a little bit and on the 4-2-1 adds more pull I could of read wrong though. Does The sound of you exhaust get deeper with adding a header?

 

[Locke]

Paul, add the potential cost of shipping to a used manifold, and see if it compares to having the stocker repaired. We repaired 3 horrible cracks in a 4g63 manifold for far less than we could find one for in a scrap yard. I would suppose this is all situational, though. Results may vary.

how much extra power would a header add? I have also read on the 4-1 header you lose a little bit and on the 4-2-1 adds more pull I could of read wrong though. Does The sound of you exhaust get deeper with adding a header?

4-1's are efficient in the higher RPMs - hence the feeling of lost power or no gain on the street, whereas 4-2-1's are efficient in nearer the middle of the RPM range. 4-2-1 gains are typically noticed during daily driving, while the 4-1 benefits more in racing situations.

The gain is not great. There are better first mod's that would make better use of your money, IMO.

Generally, exhaust note will sharpen with any properly collected tube header.

 

[amskater]

Paul, add the potential cost of shipping to a used manifold, and see if it compares to having the stocker repaired. We repaired 3 horrible cracks in a 4g63 manifold for far less than we could find one for in a scrap yard. I would suppose this is all situational, though. Results may vary.



4-1's are efficient in the higher RPMs - hence the feeling of lost power or no gain on the street, whereas 4-2-1's are efficient in nearer the middle of the RPM range. 4-2-1 gains are typically noticed during daily driving, while the 4-1 benefits more in racing situations.

The gain is not great. There are better first mod's that would make better use of your money, IMO.

Generally, exhaust note will sharpen with any properly collected tube header.

4-2-1 sounds the way to go for me since im not planing on racing. So far ive added a short ram intake, and im looking for a GST Muffler but after that I may look for a header. any Company's you would recommend me looking into for a header?

 

[Locke]

DC Sports or Pacesetter, the latter being the cheaper.

 

[amskater]

thanks for the advice ill look into those

 

[amskater]

how does this header look?


Does anyone here have a non name brand header? Do I also need the down or will a header bolt up to the oem parts?

 

[bullettdsm]

how does this header look?

Invisible

Does anyone here have a non name brand header? Do I also need the down or will a header bolt up to the oem parts?

Ebay headers are fine by me. They come with the flex pipe. I like to get the ones that have the bolt together connection (as opposed to the slip fit).

MB

 

[link16]

Ebay headers are fine by me. They come with the flex pipe. I like to get the ones that have the bolt together connection (as opposed to the slip fit).

If you get the slip fit type, you can either use a JB weld to keep it secure or actually have it welded together around the crease.

 

[amskater]

Invisible





Ebay headers are fine by me. They come with the flex pipe. I like to get the ones that have the bolt together connection (as opposed to the slip fit).

MB

my bad here are the links
eBay Motors: 95-99 MITSUBISHI ECLIPSE RS GS DC-S T304 RACING HEADER (item 130176670583 end time Nov-26-07 15:45:10 PST)


eBay Motors: Eclipse 95 96 97 98 99 NT NA Stainless Steel Header (item 150185461327 end time Nov-26-07 13:39:34 PST)

 

[link16]

my bad here are the links
eBay Motors: 95-99 MITSUBISHI ECLIPSE RS GS DC-S T304 RACING HEADER (item 130176670583 end time Nov-26-07 15:45:10 PST)


eBay Motors: Eclipse 95 96 97 98 99 NT NA Stainless Steel Header (item 150185461327 end time Nov-26-07 13:39:34 PST)

Both are the "Slip fit" type of headers. They will work, but they have been known to provide an exhaust leak around the joint.

 

[amskater]

Both are the "Slip fit" type of headers. They will work, but they have been known to provide an exhaust leak around the joint.

should I search of a bolt up header instead?

 

[4UH8ERS]

should I search of a bolt up header instead?

Yes, avoid the headache of the slip-fit. Although some may work just fine, they have been known to leak quite often.

 

[DSM LoVeR 96]

i say do some stainless steel headers since u have this problem. try ebay serch for some good ones off ebay in the forms. my friend put some on his RS. they helped the power a bit and the look.



ps: yes dont do slip fit. my friends gets lose by the bolts a ratells alot. pain in da ass. bolt up is the way to go

 

[amskater]

i say do some stainless steel headers since u have this problem. try ebay serch for some good ones off ebay in the forms. my friend put some on his RS. they helped the power a bit and the look.



ps: yes dont do slip fit. my friends gets lose by the bolts a ratells alot. pain in da ass. bolt up is the way to go

good to know hopfully I can find a good header for a good price. it should say on the ebay ad if its a slip fit or bolt on right

 

[DSM LoVeR 96]

good to know hopfully I can find a good header for a good price. it should say on the ebay ad if its a slip fit or bolt on right

you can tell by looking for that part of pipe that usely will slip into the other pipe. if it dosent have that its a bolt togather header.


heres a perrty good pair of bolts ons. they stoped making thes kind too theres only like 2 left


eBay Motors: 95-99 Mitsubishi Eclipse RS GS N/T Header W/Downpipe 97 (item 310001513570 end time Nov-28-07 16:57:09 PST)

 

[amskater]

ok cool I can see the difference now

 

[amskater]

does anyone know the regulations for CA regarding putting a header on your car?

 

[VelocitàPaola]

The header needs a CARB exempt number from the manufacturer. eBay headers won't have that... many bigger manufacturers will, though.