Exhaust manifold

[BakerEdition]

When I start this up after it has sat all night...I hear an exhaust leak....knowing that these are known for exhuast manifold and or gaskets...I see that they have a Header replacement for the manifolds...My question is...I know these will bolt to the engine...but are they a bolt up to the factory exhaust? Has anyone done this?

 

[panda24619]

shortys rnt worth it. for the trouble you go threw to put them in, since taking the old manifolds off is a joke. on mine most bolts had to be drilled and taped. and the performance that they give is slight to none.

 

[BakerEdition]

well mine was a California truck..hoping they all come out easy...just wanna do this once..

 

[panda24619]

well mine was a California truck..hoping they all come out easy...just wanna do this once..

so is mine. haha

 

[zets101]

My manifolds are starting to leak too. I'm pretty sure all the bolts will break off and need to be drilled. One stud is already broken off from the previous owner . I'll be sticking to the exhaust manifolds because if it isn't a decent upgrade then I don't see it being worth the money.

 

[BakerEdition]

manifolds seem to be a common thing on these...im not so concerned about performance upgrade as much as I dont want to ever have to pay someone else to do this again! when I do it that is...

 

[toms89]

If one stud breaks you may be able to stop exhaust leak before gasket blows out if you drill out and re-tap that stud right away. If you wait long enough the gasket will blow out then it will leak even if you install new bolt. Then your stuck with removing the manifold and replacing gasket.

I waited too long to drill and re-tap mine. So while it was quiter it always tinged as the gasket had blown out. If you pull out fender wells you have fairly good access.

Fixed my exhaust leak recently though without any drilling or re-tapping. !!

 

[Canadian Expy]

I did gibson shorty headers they are a pain in the A$$ to install , mainly getting the old ones off. Although mine is in Canada with winter and salt for 6 months

 

[KWT2000]

the manifolds were easy to get off as i have had studs break on both sides.. nothing to it but time

 

[BakerEdition]

Did you notice an increase in heat under the hood? I just had my new trans pan put on and I talked to guy about the headers and he said you gain nothing at all by doing it and all it does is create more heat under the hood??

 

[Thermo]

I have pulled the headers off of my truck and I replaced the bolts with some allen head bolts. Should make getting things out a lot easier in the future. No more dealing with the factory bolts. They are grade 5 bolts, so, I'm not worried any more. Sure, it was an extra $20 to do the upgrade, but what is the "cost" to drill out a bolt and take all that time? Seemed pretty cheap to me.

 

[DR3W]

Yeah, im waiting til i pull my engine out to rebuild it. Than im getting long tube headers and fill custom true dual exhuast

 

[toms89]

Did you notice an increase in heat under the hood? I just had my new trans pan put on and I talked to guy about the headers and he said you gain nothing at all by doing it and all it does is create more heat under the hood??

Ceramic coated! It works great for keeping the heat in the headers. Mine were coated inside and out and I was impressed with the lack of heat radiating off the headers as compared to non-coated headers.

 

[panda24619]

Ceramic coated! It works great for keeping the heat in the headers. Mine were coated inside and out and I was impressed with the lack of heat radiating off the headers as compared to non-coated headers.

is it a lot? cause my engine bay is HOT! it melted my fuse holder for my amp cable. so i have to get a new one now.

 

[walnuts4x4]

I wanna set of headers... but will probably wait until I can do a L-motor swap... and my 4.88s gears

 

[99 Expy]

Ya, Ive got a leak in mine as well, but like some of you, I'm waiting till I pull my motor and want to get new heads, so it can wait another year.

 

[bajaexpy]

is there longtubes for a 97 4.6?

 

[2000eb]

No... would have to be custom made

 

[bajaexpy]

No... would have to be custom made

Any good companies? Or just a local shop for the best bet. And do you know if would you need a different down pipe?

 

[toms89]

is it a lot? cause my engine bay is HOT! it melted my fuse holder for my amp cable. so i have to get a new one now.

I purchased ceramic coated headers. They were about $120 more than chrome headers same make and model. But I know there are places that will ceramic coat stuff.