What is this exhaust part?

[AuroraGirl]

I

Will you please send me the part number for the pictured Heat Riser Valve. Trying to find one for my '84 Jimmy.

Thanks

have a used manifold butterfly but not the valve to operate it

 

[Octane]

Cut out the old butterfly or lock/weld it open. I removed my 4 bbl carb butterfly.Now my truck is a two speed tho. Wide open and stop.What else does one need?

 

[DoubleDingo]

Cut out the old butterfly or lock/weld it open. I removed my 4 bbl carb butterfly.Now my truck is a two speed tho. Wide open and stop.What else does one need?

An on/off switch!

 

[78C10BigTen]

My 78 had this also but swapping motors i swapped the whole exhaust over to headers and custom exhaust and deleted the whole shebang.

 

[Octane]

An on/off switch!

Or just enough gas for the 1/4 mile?

 

[AuroraGirl]

Cut out the old butterfly or lock/weld it open. I removed my 4 bbl carb butterfly.Now my truck is a two speed tho. Wide open and stop.What else does one need?

Boost?
another 4 barrels?
all that intakes gonna need some more flow ability
perhaps a few more inches on the exhaust diameter, for funsies or research?

 

[Octane]

Boost?
another 4 barrels?
all that intakes gonna need some more flow ability
perhaps a few more inches on the exhaust diameter, for funsies or research?

All I could afford at the time was two and a half inch pipes with flowmasters, no boost. But as Dale Earnhardt said, winning is based on that distance between the bottom of your accelerator and the floorboard?

 

[AuroraGirl]

All I could afford at the time was two and a half inch pipes with flowmasters, no boost. But as Dale Earnhardt said, winning is based on that distance between the bottom of your accelerator and the floorboard?

Praise dale raise hell

 

[Jimmy84]

I

have a used manifold butterfly but not the valve to operate it

 

[Jimmy84]

AuroraGirl:
Would you send me the thickness of the valve housing?
My 1994 5.7 doesn't use crossover so I don't need a functioning valve, I just need one that's the correct thickness to make my new y-pipe bolt up correctly.
If the Valve that you have is thinner than the adapter I have currently, I may be interested in purchasing yours. Please let me know. Thank you

 

[AuroraGirl]

I’ll get the thickness and ID of the opening for you

 

[AuroraGirl]

It’s a 2 inch opening and 1.08 inches or just about 28mm thick, hard to tell the intended thickness with the rusty build but it’s just over an inch could easily shave.
The opening is oval on the one side snd the circular is where I got the measurements. I’ll post pics of valve and manifold

 

[AuroraGirl]

9428 and 16 are numbers on the weight for the butterfly no idea what for moves freely. Something tells me you need 2.5 tho? I can check other manifolds

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[AuroraGirl]

? I found a thicker one unknown dimensions if you wanted me to measure I’d guess about 30% thicker but idk