JHM Longtube Header Thread

[cabracco85]

JHM must be busting their ass!! they haven't had much to say for quite some time.

JHM has been very busy with all of the parts they are working on. They should have alot of goodies coming out shortlly.

[cabracco85]

Yes, that last car on the JHM headers video was loud as hell. 121 db is pretty crazy. I am sure many people will like that, but I think I will wait for a quieter version to hit the market.

The car in the video didnt have any resonators thats why it was so loud. I am not sure how many dbs it would be though. JHM is also working on a catback system too which will work really well with the headers.

[Boh_e36]

its 121db outside the car.

Thats still less noise than my ex-wife . . .

and having heard your car in person, I can vouch . . . it's frickin loud!

- Todd (Achtuning)

[beecha91]

Thats still less noise than my ex-wife . . .

and having heard your car in person, I can vouch . . . it's frickin loud!

- Todd (Achtuning)

[cabracco85]

Bump this thread up. Any updates?

[sway]

^maybe some whp gains?

[jaybquick@JHM]

Hey guys I have been aware of this thread for a while, just been busy answering your phone calls and emails.

First off thanks for starting this thread and for all the excitement. I haven't had a chance to read much of this thread but browsed it really quickly. I am quite happy to see that all our hard work is appreciated. A LOT more is coming.

We have currently shipped 4 sets of these headers and have several more paid for, so we have not had a need to make a public announcement as we are still working on final options and details of the kit.



As of right now we have the following updated pictures and pricing and info for you guys.





And for giggles a pic of the stock headers we cut up before this all began.



PRICING INFO

JHM Header kit = $2500 (see pic above for all that is included)
optional - JHM lengthened primary 02 sensors = $250 (you can lengthen yours or get these)
optional - Race Catalytic Converters = $350 (Spiral Metallic Substrate) - Better for performance
optional - High Flow Catalytic Converters = $250 (400 cell)- Better for emissions

ABOUT THE CATALYTIC CONVERTER OPTIONS
Obviously the High Flow cat will do better with CO, HC and Nox reduction but will take more HP than the Race Cats will. The Race cats tend to do pretty good for HC and CO but are a little limiting with Nox reduction, but obviously flow better. I was a smog tech here in California for 6 years so I am really well versed on the emissions end of this stuff. None of these are considered smog legal in the state of California and some other strict states, but this is the case with all the current downpipes out there. We have found that they will pass the tailpipe test depending on the year and cat used here in CA, but obviously the visual would fail here in CA.



ABOUT THE CONTENTS OF THE KIT AND THE INSTALL NOTES

Contents of package
1 - JHM stainless steel passenger side header
1 - JHM stainless steel drivers side header
1 - JHM stainless steel drivers side mid pipe
1 - JHM stainless steel passenger side mid pipe
2 - OEM Exhaust manifold gaskets
3 - OEM Exhaust manifold studs (to replace the 3 bolts removed)
3 - OEM Exhaust manifold nuts (to replace the 3 bolts removed)
4 - Stainless steel header flange to mid pipe bolts
8 - Stainless steel header flange to mid pipe washers for the nut side and bolt side
8 - Stainless steel header flange to mid pipe nuts, we supplied two per bolt so you can tighten one then use the 2nd nut to lock it in place so it won’t back off.
2 - Header flange to mid pipe gaskets (if you ever have issues with these gaskets we have had great experience with the use of Permatex Copper Silicone on the flanges without any gaskets)
Optional
1 - Pair of JHM lengthened primary 02 sensors
Or
1 - JHM primary 02 sensor lengthening kit (wires, connectors and covering included)

General Installation Notes
-If you did not purchase longer front 02 sensors from us, you MUST lengthen the primary (front) 02 sensor wires to reach the new 02 sensor location at the header collector. They should be lengthened by about 2 to 3 feet, if not done properly you WILL have issues with how the car runs. It is important to use high quality wire, solder all the connections and put protective covering over the wires. Or use high grade style butt connectors that require to be heat shrinked once completed (not the cheap ones at car parts stores but the good stuff found at electronics stores).
-When routing the front and rear 02 sensors further back it is VERY important you secure them so they don’t rub on anything or are close to the pipes to burn through, zip ties work really well for this. It is also important that the 02 sensors that are plugged in on the drivers side (both front and rear) are hooked up to the header and mid pipe on the drivers side and then do the same for the passenger side.
-Torque all nuts on the header to block mounting studs to 25Nm or 19ftlb.
-Once you install our additional studs you will have studs and nuts for ALL of the mounting holes.
-It is difficult to get to the lower nuts on the headers so more than likely you will have to remove the aluminum motor mount brackets to gain access. Then put the mounts back on once the headers are fully secured and tightened.
-The Alternator may have to be removed to gain access to install the headers then reinstalled once completed. Some cars need the alternator coolant pipe slightly bent as well for clearance.
-Header wrap: It is HIGHLY recommended to wrap the headers in the area where the stock manifolds were located to keep heat from the factory wiring, motor mounts, alternator and coolant pipes. You should only have to go about 1 foot at most past the end of the motor since the factory downpipes were not shielded and these travel along the same path.
-Cat back connections, fitment and power gains: Our longtube headers and mid pipes are the EXACT same length as the stock and are in the same location as stock BUT they are a larger 2.5” diameter. So depending on your cat back manufacturer (they may have necked it down to fit the stock 2.125” downpipe) you may have to cut several inches off your cat back if it was necked down. This is VERY important, if you spent this time and money to put these on the car, having a necked down exhaust will LIMIT the power gains. Also for maximum performance we highly recommend a JHM cat back or any other quality dual 2.5” cat back with an X-pipe and straight through style mufflers. 2.25” systems and systems with H-pipes will limit the power gains.



Hopefully soon we will officially announce these publicly and get them on our online store, if you want a set now give us a call.

[cabracco85]

Thanks for the update on the headers.

[whartung]

ahahaha!!! they're here!

hold on. i'm going to go become a criminal to get the money to buy these...

[sway]

what's the material used for the header wrapping?

[Justincredible]

what's the material used for the header wrapping?

2nd that I saw it when you came into Mi. but I never wrote the name if it down. I would like the think that Im #5 shipped. I know there is a long list but I'm so excited. Thanks Jay

[beemercer]

And for giggles a pic of the stock headers we cut up before this all began.

Calling those headers made me laugh my ass off, such an engineering disappointment.

[Bpitz15]

Your welcome for the thread Jay =)
I got the chance to hear and take a ride in an S4 with these mated w/ Fast intentions resonated w/ an X-pipe today and I cannot explain the smile it put on my face. These things sound perfect!!! the power is definitely there and i didnt hear one rattle or vibration coming from under the car. The car was on coilovers as well so i'm sure that put a restriction on space as well.
I want these so badly!!! And any of you who think these are too raspy, they sound incredible in person. I was revving my full-back Fast intentions and "anonymous" revved his FI w/ headers and it was a whole different/incredible sound.

I am rambling..but WOW!!!

[jaybquick@JHM]

what's the material used for the header wrapping?

DEI and Thermo-tec are two that I have used. I will probably order some up for stock when we release the headers.


Some pics I found





You don't need to wrap them all the way down like this, but this gives you a good idea.

2nd that I saw it when you came into Mi. but I never wrote the name if it down. I would like the think that Im #5 shipped. I know there is a long list but I'm so excited. Thanks Jay

Yup, YOUR NEXT.

Calling those headers made me laugh my ass off, such an engineering disappointment.

Yup, they are cosmetically identical to the C5 A6 V8 headers that were introduced back in 2009. Definitely only engineered for fitment and not performance. Reminds me of the old 60s muscles cars Log style cast iron manifolds. They gave those just about as much love as those.

Your welcome for the thread Jay =)
I got the chance to hear and take a ride in an S4 with these mated w/ Fast intentions resonated w/ an X-pipe today and I cannot explain the smile it put on my face. These things sound perfect!!! the power is definitely there and i didnt hear one rattle or vibration coming from under the car. The car was on coilovers as well so i'm sure that put a restriction on space as well.
I want these so badly!!! And any of you who think these are too raspy, they sound incredible in person. I was revving my full-back Fast intentions and "anonymous" revved his FI w/ headers and it was a whole different/incredible sound.

I am rambling..but WOW!!!

Nice to hear reports of that car running. His was the 2nd car that got em. I bet it sounded cleaner and crisper due to all the engineering we put into those headers.

[10MPG]

<******** Me "patiently" waiting... LOL

[SuperAvant]

Man I will definitely get a set. Just got to save first!

[cabracco85]

2nd that I saw it when you came into Mi. but I never wrote the name if it down. I would like the think that Im #5 shipped. I know there is a long list but I'm so excited. Thanks Jay

Thats cool that you are getting a set of headers. When you go to put them on i could come out and watch/help.

[Dodge2Dub]

Ahh I can't decide! Headers for the car or more go fast parts for the bike!!

[cabracco85]

Ahh I can't decide! Headers for the car or more go fast parts for the bike!!

The bike should be pretty fast, so you should get the go fast bits for the car

[i_eat_staples]

nice

[JayyyyyC]

I'm sorry if this question was answered before. I've been following this thread for a while, and the product looks promising.

But will the set of headers really require a complete removal of the engine for install? I know JHM always offers the best price, and I respect them for that. But with a $2500 tab for headers and consistent rumors of sky high labor prices for this install, in the end, will this end up being a $3.5 grand mod?

[Dodge2Dub]

$3500-$4000 is my guess. It should be well worth it when paired with the soon to be perfected intake manifold. The headers are expected to get 15-40 wHp, but when paired with other mods, the gains will likely be more. Jay please chime in if I'm incorrect.

My guess is the headers as well as the proper tune should put our cars at about 400 cHp and 360 cTq.

[ngng]

i'll be picking up a set of these, instead of exhaust wrap I would suggest you guys look into a ceramic coating such as (http://performancecoatings.com/). I've used this on my race bike and have had great results.

[sway]

i'll be picking up a set of these, instead of exhaust wrap I would suggest you guys look into a ceramic coating such as (http://performancecoatings.com/). I've used this on my race bike and have had great results.

Would using both be over kill. Can someone please post pics of there wrapped headers and or ceramic coated headers. It looks like it would be a PITA to fully get the inside part of the headers coated. Does the wrap have an adhesive to it or does it need to be secured by some other means?

[ngng]

Would using both be over kill. Can someone please post pics of there wrapped headers and or ceramic coated headers. It looks like it would be a PITA to fully get the inside part of the headers coated. Does the wrap have an adhesive to it or does it need to be secured by some other means?

do some research and your questions will be answered

[cabracco85]

Would using both be over kill. Can someone please post pics of there wrapped headers and or ceramic coated headers. It looks like it would be a PITA to fully get the inside part of the headers coated. Does the wrap have an adhesive to it or does it need to be secured by some other means?

The problem with the coating is that it can chip really easy. The space where the headers go is pretty tight area, so there is a possiblity of someone bumping them and scratching off the coating. There is alot of important items by the headers that you need to keep the heat out of. Thats why from the factory the manifolds have the heat sheild on them. You cna do the ceramic coating but it will cost more then just wrapping them. Can you touch a cermaic coated header? No, but with the wrap you can for a brief second or so. The wrap i think would be the better option. But if you want to spend the funds on a nice ceramic coating then go ahead, but make sure you dont chip it when you install it. As for the wrap they do have a adhesive spray that you cna use. Or you can wrap it nice and tight and at the end of the wrap use a clamp to keep it on. The have nice metal clamps or you can just use a hose clamp.

[ChronicTeutonic]

My vote is for the ceramic coating. I've heard stories of the wrap causing headers to warp, but who knows if that is related to the combination of heat retention and stress placed on the header by vibration or the weight of the exhaust or the wrap itself. It also seems to "smooth" the inner surface of the tube.

[sway]

do some research and your questions will be answered

It's kind of hard to do so seeing how these headers just came out and I want to see these headers wrapped or coated. Thank you for beeing so incredibly helpful though

[cabracco85]

My vote is for the ceramic coating. I've heard stories of the wrap causing headers to warp, but who knows if that is related to the combination of heat retention and stress placed on the header by vibration or the weight of the exhaust or the wrap itself. It also seems to "smooth" the inner surface of the tube.

You can get them wrapped or coated. Thats just a personal preference i guess. I have not heard many stories of warping. I did hear stories of the header rusting out and not being able to tell cause of the wrapping. Since these are stainless they shouldnt rust though. Either way wrapping or coating is a must unless you want to get some main items too hot and cause problems. The water pump is there, powersteering, and a few other items just to name a few. Keeping as much heat out of the engine bay is the key here.

[Justincredible]

Thank you for beeing so incredibly helpful though

LOL I feel your pain I hate research as an answer. It was a good link tho

Look personal preference is not fact but just that personal preference. Some people see there point as the MOST important point of view. Thus we get away from the points we are looking to find

In this situation. Ceramic is a GREAT option, header rap can get wet in the winters and can hold oil if any is spilled on them or dripped on them. The coating creates a water tight seal over the metal this not only keeps the heat inside the headers it helps the flow speed of the exhaust by keeping the heat in the exhaust. Altho it can flake if, you get the good stuff its usually Very hard to have it come off. If you have the money and the time Ceramic coating is a nice way to go.

IMHO doing both is not only a waste of money but complete over kill.

Im going to wrap mine. You can control how much protection and where and WAY Less. Ive seen some stuff like this cost almost 500$ where the wrap is less then 100 but still just as effective. The wrap is just like an ace bandage you need to fix it or clap it to the headers. Use the same thing as like a hose clamp.
The thing I like about the wrap is if you install the headers your self you can add more protection where you feel you need it. With Stainless headers you should not see rust so standing water shouldn't be an issue

[ngng]

It's kind of hard to do so seeing how these headers just came out and I want to see these headers wrapped or coated. Thank you for beeing so incredibly helpful though

on exhaust wrap and ceramic coating

[S-Fore]

Ahh I can't decide! Headers for the car or more go fast parts for the bike!!

lol, me too! Curious to see the results on a TIP car though.

[sway]

on exhaust wrap and ceramic coating

Yeah dude

Anyway, thanks justincredible. I see your point on how personal opinion comes into play. It's sort of hard to see what's good when the manufacturer says it's the best thing on earth and there are people that write reviews but are not really credible sources (no one in particular!!).

[Devitan]

If my engine needs to be removed I will be putting these in. I am just worried that the non-res catback would be too loud for me with the headers. Are there any videos of the headers with a res system? I can never tell the difference...which is kind of sad...

[chichum]

Second that... Reminds me of the Jeep forums I frequent. Everyone wants to help everyone.

Hey Hey! I must have held 15-20 Jeep wrenchfests at my place.. I had a lift, compressor and tools out the ass at my last home in PA. I would invite anyone over and help them with lifts / lockers / winches / and well anything for beer and pizza... It's good to see I've joined this kind of community again...

[SuperAvant]

Hey Hey! I must have held 15-20 Jeep wrenchfests at my place.. I had a lift, compressor and tools out the ass at my last home in PA. I would invite anyone over and help them with lifts / lockers / winches / and well anything for beer and pizza... It's good to see I've joined this kind of community again...

I just wish there were a few people in the Central MA area to help install these!

[ginkof]

I just wish there were a few people in the Central MA area to help install these!

How soon do you plan on getting these?

what is the wait time on these?

[SuperAvant]

How soon do you plan on getting these?

what is the wait time on these?

I hope to get them by early summer. Too cold to put them in now :-)

Not sure the wait time yet, I sent an email to JHM today. Are you going to get them? We could have a DIY day. I have ample garage space for it.

[GameBreaker]

..... Im going to wrap mine. You can control how much protection and where and WAY Less. Ive seen some stuff like this cost almost 500$ where the wrap is less then 100 but still just as effective. The wrap is just like an ace bandage you need to fix it or clap it to the headers. Use the same thing as like a hose clamp.
The thing I like about the wrap is if you install the headers your self you can add more protection where you feel you need it. With Stainless headers you should not see rust so standing water shouldn't be an issue

I also would recomend using the wrap if you live in a colder climate. I've had ceramic coating on Long Tube headers and they held up really well, but the issue was over time with all the winter driving I did in that car the salt would build up and eventually discolored the bottom half of the headers. Also, with another setup I had... stainless steel can sometimes turn a bit... purpley from heat over time, but with the engine bay so snug my guess is you will never see it.

Lastly, Justincredible.... when you get yours and are in Chicago... I WANT TO HEAR IT!

[cabracco85]

I also would recomend using the wrap if you live in a colder climate. I've had ceramic coating on Long Tube headers and they held up really well, but the issue was over time with all the winter driving I did in that car the salt would build up and eventually discolored the bottom half of the headers. Also, with another setup I had... stainless steel can sometimes turn a bit... purpley from heat over time, but with the engine bay so snug my guess is you will never see it.

Lastly, Justincredible.... when you get yours and are in Chicago... I WANT TO HEAR IT!

I want to hear it too.