105 Headers Comparison/shootout! - Alfa Romeo Bulletin Board & Forums
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post #1 of 126 (permalink) Old 02-16-2019, 06:39 PM Thread Starter
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105 Headers Comparison/shootout!

Window shopping for the best sounding headers:


1. Classic Alfa


Price: $722.40
Includes gasket: ?
Ceramic option: no
Notes:


2. Centerline


Price: $379.00 / $469.00 (ceramic option)
Includes gasket: yes(heavy duty)
Ceramic option: yes
Notes: claimed “10-15% increase in top end power”

3. Alfaholics


Price: $670.80
Includes gasket: no
Ceramic option: no
Notes:

4. Vickauto


Price: 299.00
Includes gasket: yes
Ceramic option: no
Notes: 1.5” OD tube and 2.0” OD collector

5. Spruell motorsports


Price: $889.00
Includes gasket: ?
Ceramic option: yes (included in price)
Notes: claimed 3-10 hp increase
“Tri-Y design”



Anyone know which one would sound the best? Perhaps the one with the largest diameter?


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Last edited by tremere613; 02-16-2019 at 06:52 PM.
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post #2 of 126 (permalink) Old 02-16-2019, 06:54 PM Thread Starter
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This thread is focused on the series 3 spider...
But if anyone has any experiences to share please do so!

Thank you all!
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post #3 of 126 (permalink) Old 02-16-2019, 07:58 PM
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Take a close look at the angle between the flanges and the primary tubes. The tube should follow the direction of the exhaust port which is not at 90 degrees to the tube. IAP headers were incorrect at one time. The headers with long primaries and shortish secondaries are (I think) more like GTA headers.
Claims of HP increase depend upon what system they are being compared with. The Alfa one piece manifolds from about 75 to 99 strangled the engine and anything decent is an improvement. The factory 2 piece manifolds are probably as good as any headers at low to mid rpm but you are unlikely to see them on a race motor.
I think that your choice should be based upon your engine preparation and beware of headers with large bore tubes which can kill the low to mid range torque.
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post #4 of 126 (permalink) Old 02-16-2019, 08:08 PM Thread Starter
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Quote:
Originally Posted by alfaparticle View Post
Take a close look at the angle between the flanges and the primary tubes. The tube should follow the direction of the exhaust port which is not at 90 degrees to the tube. IAP headers were incorrect at one time. The headers with long primaries and shortish secondaries are (I think) more like GTA headers.
Claims of HP increase depend upon what system they are being compared with. The Alfa one piece manifolds from about 75 to 99 strangled the engine and anything decent is an improvement. The factory 2 piece manifolds are probably as good as any headers at low to mid rpm but you are unlikely to see them on a race motor.
I think that your choice should be based upon your engine preparation and beware of headers with large bore tubes which can kill the low to mid range torque.


I’m not following your first statement about primary tubes, which one of the websites above have that issue with their offering?


Secondly, which product has large bore tubes?

I’m only looking for a beautiful exhaust note and street drive-ability.
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post #5 of 126 (permalink) Old 02-17-2019, 12:05 AM
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yes, I think you should add

6) Various, for example OKP, Germany
2 piece euro manifold (euro downpipe to cat required)
Price: ca. 350$
Notes: designed by alfa engineers
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post #6 of 126 (permalink) Old 02-17-2019, 05:39 AM
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Quote:
Secondly, which product has large bore tubes?
I doubt that anyone has details on all of the listed headers - a good project Call the vendors and ask them what are the primary, secondary and final tube diameters.
I don't know if any of your list have the flange issue but it would be more likely on cheaper ones and less likely on ones from performance oriented vendors.
If you search the ABB you will find reports on different headers which should help.
I would find a good used factory two piece manifold if I had a motor that was not built to make HP at high rpm.

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post #7 of 126 (permalink) Old 02-17-2019, 05:54 AM
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My 2 cents the Spruell headers are very close to a design a buddy of mine came up with years ago on a 1600 race engine which he was extremely pleased with. As far as tonal quality who knows. Unless you are building a screamer engine, the stock alfa cast header, was ....engineered for the car.
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post #8 of 126 (permalink) Old 02-17-2019, 08:22 AM
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I'm a fan of the Spruell header, but using it in a road going car creates issues, the third and fourth primary tubes come close to the over flow tank, and brake booster, so some sort of shielding needs to be addressed to prevent the the 4th primary tube from melting the overflow tank and number three goes close to brake booster. Food for thought.
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post #9 of 126 (permalink) Old 02-18-2019, 07:14 AM
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i dont see my old school bundle of snake "sperry" beauties up there. i should have bought the jigs when i had a chance
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post #10 of 126 (permalink) Old 02-18-2019, 08:15 AM
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Quote:
Window shopping for the best sounding headers:

Ahem . . . Headers don't "sound" (at least not much, anyway). Moreover, on a stock engine they may add a few hp but, IMHO, are more for looks and street-cred---not that such values are in any way bad . . . If you are looking for a better sounding exhaust, look to your exhsust system. Just putting on a straight "stinger" exhaust pipe will sound a lot better and cost a lot less money.
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post #11 of 126 (permalink) Old 02-18-2019, 08:20 AM
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i dont see my old school bundle of snake "sperry" beauties up there. i should have bought the jigs when i had a chance
Second that! #AlfaRomeoNoodleClub
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post #12 of 126 (permalink) Old 02-18-2019, 08:29 AM
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i dont see my old school bundle of snake "sperry" beauties up there. i should have bought the jigs when i had a chance

And apparently the guy that bought 'em is just sitting on them. Sigh . . .
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post #13 of 126 (permalink) Old 02-18-2019, 09:39 AM
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Headers for an Alfetta

I`m looking for a good set of steel (or stainless) headers for an Alfetta. The lower downpipes condition isn`t critical. But upper runners must be solid.
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post #14 of 126 (permalink) Old 02-18-2019, 10:50 AM
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Ahem . . . Headers don't "sound" (at least not much, anyway). Moreover, on a stock engine they may add a few hp but, IMHO, are more for looks and street-cred---not that such values are in any way bad . . . If you are looking for a better sounding exhaust, look to your exhsust system. Just putting on a straight "stinger" exhaust pipe will sound a lot better and cost a lot less money.
+1 for a stock 60's exh mani they are pretty darn good if your motor is near stock. they more dimensionally stable and dont have the extreme radiant heat to cook things around them in the engine compartment

they also have a proper engineered slight bevel on the mounting flange but i had open mine up for the anti reversion step along with the sloppy fitting gasket to go with my modified ports. a big thing with the aftermarket headers is you might have to bevel them yourself and make sure the gaskets aren't interfering with the ports. they can be misaligned in both planes if i recall correctly. I spend a day trimming and hogging them yourself because most engine builders will not go to these lengths unless you want to pay em a few extra $$$

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And apparently the guy that bought 'em is just sitting on them. Sigh . . .
jake still have the jigs? come to think of it mine might be for the TS... i cant remember

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Second that! #AlfaRomeoNoodleClub
sweet, medusa headers are quintessential italian looking!

ive been warned that sperry's are fragile and a motorcycle flex type coupling is needed after the collector to avoid any stress fracturing.

Last edited by davbert; 02-18-2019 at 10:53 AM.
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post #15 of 126 (permalink) Old 02-18-2019, 10:59 AM
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sweet, medusa headers are quintessential italian looking!

ive been warned that sperry's are fragile and a motorcycle flex type coupling is needed after the collector to avoid any stress fracturing.
Will do, was ready to get that done regardless! I can't figure out how the headers hook up to the collector for certain. It looks like the primaries are only secured to the collector by a single bolt on a bracket, which is welded on the lowest primary. Maybe that's another reason why they crack, all that leverage on a single point, etc...

Anyone ever fit a set of Sperry headers with a GTAM side pipe on a S3 Spider? Because that's 100% happening rather soon, unless you tell me it's a terrible idea

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