Blue Stripe

[P Machy]

Left Side Head P/N: 2C5Z-6049-BAB
Right Side Head P/N: 2C5Z-6049-CAB

Those are the latest P/N with 9 threads.

[BurnTire]

Left Side Head P/N: 2C5Z-6049-BAB
Right Side Head P/N: 2C5Z-6049-CAB

Those are the latest P/N with 9 threads.

Hey P are those the 1/05 heads or a production head part #.

[50 BMG]

Update:

The 3rd orange car (joe public off the street car) has 9 thread heads, production date 03/04. Customer also looked through bore scope and counted 9 threads before we said anything to him. Car just left the shop...

[BurnTire]

Ok Dan this is for you Big Boy


I was so dam curious about this issue that I had to see for myself.
I took a look at a set of unmolested stock heads from an 04 cobra.
This car was built 11/03.
I retract any previous statements to you Dan about being wrong on the issue. You are correct 04's have 9 threads. I have to take a look at mine again.




Here are my findings


This 04 Cobra Head has 8-9 threads.


I took an impression of the hole with a good piece of Trident Gum. What a waste of a good piece of gum. It took about 8 to 8 1/4 full turns of the plug to seat it depending on the hole we selected. It is hard to see the gum but I counted 8 full threads on the impression. With the partial threads at the start and finish it is closer to 8 1/2 to 9 threads depending on cut.



Head Stamp



Sticker On head. Maybe someone can verify what this is for the date is 7-24-03



Conclusion:

1. This 04 OEM Production Head has 9 threads.
2. We have pictures to prove it.
3. I wasted gum.
4. It still appears that some 04's have 4 threads. I am curious if those are only from the early part of the 04 production?

5. I was wrong and I will shut the hell up on the issue.

[50 BMG]

1. This 04 OEM Production Head has 9 threads.
2. We have pictures to prove it.
3. I wasted gum.
4. It still appears that some 04's have 4 threads. I am curious if those are only from the early part of the 04 production?

5. I was wrong and I will shut the hell up on the issue.

It doesn't matter who is wrong, it's getting the correct info out there that matters to me.

So I take it those are shaggys OEM heads?

Number 4 might be engines that were "pulled" and set aside on the line then put into a later build car. Dario's car is a perfect example of this. Also, what month/year was your car built?

[BurnTire]

It doesn't matter who is wrong, it's getting the correct info out there that matters to me.

So I take it those are shaggys OEM heads?

Number 4 might be engines that were "pulled" and set aside on the line then put into a later build car. Dario's car is a perfect example of this. Also, what month/year was your car built?

Yes this is the OEM head.

Mine was one of the last ones 3/04.

[Ethan@S3M]

Whoopty freakin doo! Here is one you can guys can argue about next. How much wood could a wood chuck chuck if a wood chuck could chuck wood.

[BurnTire]

Whoopty freakin doo! Here is on you can guys can argue about next. How much wood could a wood chuck chuck if a wood chuck could chuck wood.

Well Dan what do you think?

[Dan]

Well Dan what do you think?

An apology from the great coolant gods would be nice. There response was neither correct nor professional. I understand doubting me because they have no idea who we are however maybe they should exert half the effort Jeff has in the researching this as we had last year. What is done is done. However an apology to Indy is in order if not public then at least in a PM

[Gene]

I wish I gave a shit to be a part of all of this action. For what its worth, I still have 4 thread heads and anti seize them everytime a plug goes in. I've never had a problem.