Does anyone know the primary and collector diameters of the Hooker 2055 headers? I cant find them anywhere.

Also I have seen these headers only advertised for TPI cars, would they fit a 305 TBI?

Thanks

 

http://www.holley.com/HiOctn/ProdLin.../Emission.html

Says 1-5/8" primaries, 3" collector. But, the connection to the collector for the y-pipe is not the "standard" 3-bolt, 3" collector. It's a ball flange which uses 2 bolts, and the opening is something in the 2" range.

They will "fit" a TBI car, but not the TBI exhaust (cat). The hot ticket is to use these headers, as well as TPI single-cat application cat and cat-back.

 

I actually dont have a cat, I have an 88' 305 Camaro TBI (vin E), the exhaust manifold I have at the moment apears to be a one piece system from the cylinder head face right back to the silencer/muffler at the rear of the car, no joins at all, not even at the Y pipe. I guess the original exhaust was replaced with this system by the previous owner who wanted to keep a factory style system only without the cat. The main tube is also still only 2.5".

I want to get a good header system and the Hooker 2055 seems a good choice, however I need to know if the main tube end of the 2055 Y pipe (the bit that would normally meet the cat) would point directly towards the rear of the car once installed (I mean parallel to the side of the car). Can anyone help?
If this is the case I know I only need to cut the old exhaust pipe I have now and meet it up with the Y-pipe using a reducer.
It would be a lot simpler for me if it was the original exhaust I was modifying but I guess life's not that fair.

 

I ask the above as this picture of the 2055 looks like it points off at an angle if you use the two top ends of the Y-pipe as a visual reference if you can understand what I mean. Line up the two flanges (one partially hidden there!) and draw a mental right angle up to the main tube end of the Y-pipe. see my problem!?!?

 

The 3" opening at the end of the y-pipe, where it normally connects to a cat, is pointed in-ward like the original cat. It doesn't point straight back (parallel to the side of the car).

 

thanks five7kid!

I guess I have a problem then, back to the drawing board

 

Here ya go

 

These should give ya an idea how it looks.


David

 

Black 91 Z28-Thanks a lot man thats excellent, I can use your pics to plan my approach to this problem. Thanks again!:hail:

 

No prob. I have about 20 other pics similar to those form a bunch of different angles so if you need something specific I'll see if I have it.

David

 

Do you have any pics of the system installed on your car? I would like to know what it would look like from underneath the passenger side just behind the wheel arch when installed, (around where it would meet the cat) do you possibly have any pics of that angle?
Thanks for all your help:hail:

Scott

 

Also, how did you cope with the oil dipstick when you installed the system, any problems?
My stock exhaust manifold system gives me bad heat soak on the starter, how do the Hookers compare in this respect? will it be better or worse?

 

Hey. I'll try to get some pics of it installed this weekend cause I'm at college right now.

I had to bend the dipstick houseing a little bit but it went back in without much trouble. I didn't have heatsoak with the manifolds and I haven't noticed any change in the starter since I went to the headers. Theoretically it would be worse because headers don't retain heat as well. You can get a little heatshied for your starter from Summit if ya need to.

David

 

I am also curious about the dipstick issue, I had the Edelbrock TES once before, TOTAL JUNK in my opinion, and it had a real stupid looking dipstick holder, Do the Hookers just use the original factory dipstick mount?

 

85TPI400, Just curious, Why are the Edlebrocks junk?

Gary

 

Gary,
I should not have really said that, I think they are better than some, but for the money I just dont see them being comparable to other brands, I dont like the 1 1/2 and 1 5/8 primary idea, the design looks strange on the passenger side. and a real half as**d design for the dipstick tube.
Tony

 

Hey. I didn't have any problem reinstalling the dipstick. I had to bend the housing a bit, but I just mounted it back to one of the header bolts. Getting my hand on the housing to push it back into the oil pan was a bit tricky but not to bad. If I ever pull all the junk out of the way I'll snap a better picture. But this is all I have now.

David

 

CamaroUK, this what you wanted?

 

or

 

heres my coated hooker 2055

 

Black 91 Z28-Thanks man, that pic is just what I need to compare, thanks!
Another question, is the O2 sensor mounting still on the drivers side of the engine with the Hookers?

Thanks again!

 

yeah it is

 

So what sort of horsepower gains can be expected from swapping the stock manifold for the Hooker shorties?

Anyone have any dyno figures?