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Manifold to Header change?

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Old Aug 10, 2003 | 11:38 PM
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Default Manifold to Header change?

What kind of time am I looking at to change from stock manifolds to Dynamax headers??

Thanks!!!
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Old Aug 10, 2003 | 11:43 PM
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Default Re: Manifold to Header change? (DP77Vette)

What car? What engine? What options on engine?
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Old Aug 10, 2003 | 11:46 PM
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Default Re: Manifold to Header change? (DP77Vette)

By the way, it's a 77, L-48 350, with true duals.
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Old Aug 11, 2003 | 12:48 AM
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Default Re: Manifold to Header change? (DP77Vette)

:lurk: Days to weeks so I'll have to say it depends . It depends if you need to restore the smog plumbing - if it was installed previously? It depends if have to modify the A/C bracketry - if it was installed previously? It depends if you whant to install a stater heat shield - highly recommended - and what type of shield or would you rather fabricate your own? It depends if you find any associated parts/equipment that need immediate repair/fix? As I found heat damage to the passenger side floor pan fiberglass and preparing to fix then install heat shielding for protection. Finally you'll need to connect the collectors to the pipes - bend pipe at home or to muffler shop?
Sorry, just too many variables for a quik answer here. :rolleyes:
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Old Aug 11, 2003 | 12:43 PM
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Default Re: Manifold to Header change? (DP77Vette)

I spent about 5 hrs to finish mine. No A/C, have PS. Take the old manifold out from top, the headers go in from underneath. Still have the starter shield. Removed the spark plug shield. Got a reducer to fit the old 2.25 pipes. No leaks, no problems.

IMHO, best bang for the buck is a good set of headers....
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Old Aug 11, 2003 | 12:51 PM
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Default Re: Manifold to Header change? (DP77Vette)

I think that is the best answer - too many variables. Changing from manifolds to headers with the A/C and brackets could be all day, if you have the right spacers and studs to do the mounting

If yo decide to go ahead, I would plan on a couple of days at home and then the easiest for the exhaust is a two to the local muffler shop and have them custom make the rest of the system.
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Old Aug 11, 2003 | 01:06 PM
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Default Re: Manifold to Header change? (bigvette1)

for just the headers it took me an afternoon, it was the easiest job I've ever done on my car.

The hardest part for me was cutting off the old exhaust and fabbing up a temp exhaust until I could get it to a muffler shop.

Also if your car has AC, you don't need any special brackets or spacers.
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Old Aug 11, 2003 | 02:33 PM
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Default Re: Manifold to Header change? (bigvette1)

How was is taking off the manifolds...and broken bolts? Other Problem's?
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