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180 degree headers

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F ferrari328gt (Guest)
Hi there, David. I didn't put 180s on my car, but several folks here in Phoenix have. My observations: They sound terrific - much smoother than stock. One car used Flowmasters for mufflers, and they are quiet enough for a subdivision. Another runs open pipes, and they shake the earth - it's up to you. They are apparently not as difficult to install/remove as one would think. You have three choices for tailpipe exit: Out where the license plate is, or where the grille for the A/C condensor is (which means you have to move the A/C). Or cut holes in the inner fenders and route to the stock location. Some folks run shields to protect the paint on the decklid, some don't.

I'll let others comment on performance issues. -Steve
panteradougpanteradougMember
I don't think there are any performance issues.
They are a little load at idle in a confined space but the stock mufflers aren't too quite either.

They certainly aren't restrictive which is more then you can say about the stock mufflers.

The tubes could be too large for a stock engine at 2" but if you can run to 7000 or more they are a treat and a song to behold.

Mine exit at the stock location so nothing needed to be relocated for them.

The largest issue is that if you want trunk space the modified trunk is about half of what it was.

Hall Pantera used to sell them. I just modified my original one.

Make sure that you insulate the bottom of the trunk with that space age fabric and don't carry any living thing in there.

Well maybe your mother-in-law?
DI David in Tujunga (Guest)
Thanks Steve and PanteraDoug for your helpful comments. The engine on this '72 narrow body was rebuilt about 1 1/2 yrs ago by Hall Pantera. Allegedly the car has 475 hp. The 180 headers have small torpedo shaped cylinders bolted on at the end of the headers slightly larger than the header pipes(maybe flowmaster?)and they exit where the A/C condensor grille is. I have some photos of the engine bay including the headers....if only I knew how to upload them here. Thanks you guys. David
D Daniel #9191 (Guest)
Mark,
those 180's look fantastic! simple clean install, where did you get them and or who makes them? I've been talking with MME about building a stroker and I have to decide on what exhaust and how to address the factory cut outs and not re invent the wheel with mabye filling the holes with steel, body work and repaint, or....some kind of block out plate in black, or....what do most people do with the original cut outs?
Thanks,
Daniel
George PGeorge PAdmin.
The american V8 uses a "cross plane" crankshaft and each bank of cylinders has an uneven firing order, it creates the V8 burble we all love.

F1 cars, Ferraris, etc have a "flat plane" crankshaft, and each bank of cylinders have an even firing order, it creates that smooth "scream" or "wine" you hear from these motors.

Bundle of snakes headers are designed to combine the proper cylinders to give each half of the exhaust system an even firing order. Properly done this is good for 30+ bhp at high rpm. It also gives the exhaust more of a wine like a Ferrari. Some bundle of snakes are more successful at this than others, I don't know why this is. Dennis' exhaust does this about as well as I have heard. When he gets on the gas, his exhaust has that F1 wine, it sounds BITCHEN.

I keep a picture of Dennis' motor next to my bed, the sexiest motor I know of.
crazydavecrazydaveEFI Expert
I dont feel that 180s are worth the effort unless you plan to race. The extra hp only appears at or near the tuning rpm of the header when compared to a good header and muffler. You will loose the use of your trunk and the heat will be intense. Some cars have even burnt the paint on the deck lid. They do look cool and sound unique. If the sound and look is worth it, then go for it. Otherwise, if you really use your car, you might just stick with normal exhaust. Before my turbos, I had Big bore exhaust and loved the big-block rumble sound. And I was told you could hear me over a mile away.
rapidrapidMember
I love the way my 180's look and sound. The key with the heat issue is to have them coated. I took mine to HPC right after they were made and had them coated inside & out. You can put your hands on them within a minute of shutting down the engine. I have a heat shield on my deck lid, but do not know that it is necessary (although I have always heard that it is). Yet when you look at my headers you will notice that they pass within a half of an inch of my painted engine bay with no problems. And yes I have had this car on several long distance runs, at high speeds etc., in Arizona, with no issues. The one problem with these headers is taking them off or putting them back on. It is a royal pain! It took 3 of us, three hours to get them installed last time, and you would think that it would be easier because there are no gaskets! All of the flanges were cut with the wetjet process and port matched with the heads and use no gaskets. And if built right they will make horsepower.

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panteradougpanteradougMember
quote:
Originally posted by Rapid:
I love the way my 180's look and sound. The key with the heat issue is to have them coated. I took mine to HPC right after they were made and had them coated inside & out. You can put your hands on them within a minute of shutting down the engine. I have a heat shield on my deck lid, but do not know that it is necessary (although I have always heard that it is). Yet when you look at my headers you will notice that they pass within a half of an inch of my painted engine bay with no problems. And yes I have had this car on several long distance runs, at high speeds etc., in Arizona, with no issues. The one problem with these headers is taking them off or putting them back on. It is a royal pain! It took 3 of us, three hours to get them installed last time, and you would think that it would be easier because there are no gaskets! All of the flanges were cut with the wetjet process and port matched with the heads and use no gaskets. And if built right they will make horsepower.


I have a second or thirdgeneration Hall set.
They aren't as pretty as some of the others BUT they are much easier to install and remove at a moments notice.

On this car that is important to me.

As far a HP goes I can't think of anyone who has done a dyno test to prove anything. I would think that much like running Webers there is little point to running them on a stock engine.

The gain is defiately going to be an upper rpm one and probably, like most headers, loose HP down low.
4nhotrod4nhotrodHe who dies with the most toys is dead
quote:
I have a second or thirdgeneration Hall set.
They aren't as pretty as some of the others BUT they are much easier to install and remove at a moments notice.

On this car that is important to me.

As far a HP goes I can't think of anyone who has done a dyno test to prove anything. I would think that much like running Webers there is little point to running them on a stock engine.

The gain is defiately going to be an upper rpm one and probably, like most headers, loose HP down


I just bought a set of Halls. I'm curious to see if they are the same as yours. Can you post a picture of your engine/headers?
Will
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