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Old 08-30-2004, 01:42 PM   #15
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I am going to guess, Based on others I have seen I would say they are Thorley headers. The Thorleys have the large collector end to the ones I have seen. They could also be off of a banks system, but that is usually stamped somewhere on one of the flanges.
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Old 08-30-2004, 02:02 PM   #16
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Most probably not Thorley's. Thorley's are chromed and are of the four primaries into two secondaries into the collector. Tri-'Y' is their trademark name for the pulse control they use. Chrome is your other key.

Here is a picture:


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Old 08-30-2004, 02:29 PM   #17
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I'll bet they are Banks. Good find.

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Old 08-30-2004, 03:57 PM   #18
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Banks

Banks headers are stainless steel. The way to do it is to wait till the exhaust goes bad. Now if you add the cost of a good quality set of headers plus a new exhaust system you can get a Banks instead. Tuned exhaust headers with no coupling between any exhaust ports, ram air intake with a K&N filter, stainless exhaust with larger pipes. Engine will now pull to over 4200 rpm instead of dying at 2800 with lots more horsepower. There is even a new transmission spring so you can adjust the shift points.
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Old 08-30-2004, 06:23 PM   #19
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isn't the Banks about 2200 or more without installation? I would think you could get Thorley or similiar with the echaust and mufflers for under a grand. Am I nuts? It wouldn't be the first time
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Old 08-30-2004, 08:37 PM   #20
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well since you ask??
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Old 08-30-2004, 10:03 PM   #21
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Alan, yes you are and yes you can. I did the R & R on mine but the whole system from the headers back was $650. That still leaves $350 for a muffler shop to cut off the old and bolt up the new.
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Old 08-31-2004, 04:26 PM   #22
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I was going to fix up Stevens old set of headers but now leaning towards a complete custome system on my 454 Suburban.
http://www.stans-headers.com/ They sell a seto of P30 headers that are a Tri-Y design. I have found a couple people that have used them and been very happy. I just have to make sure they can add in the O2Sensor bung.

I have a guy in AL that sells a Mandral bent X pipe arangement then into a pair of 50 series or Delta Flows.
http://www.73-87chevytrucks.com/merc...ode=73-87UHood

It would be nothing to lenghten this system for a MH.
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Old 08-31-2004, 04:40 PM   #23
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I've bought O2 bungs at speed shops, maybe even places like NAPA have them or can order. They are only about $10.

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Old 08-31-2004, 04:43 PM   #24
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Quote:
Originally Posted by 74Argosy24MH
I've bought O2 bungs at speed shops, maybe even places like NAPA have them or can order. They are only about $10.

John
Well those headers are coated or Stainless. So I either have to damage the coating or spend $60 on a new liner and some stainless wire for the welder to put the bung on. For the Price of those headers I think they can include that bung at no extra charge if requested.
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