Hooker 73-87 GM truck LS swap system

[indymachinist]

Still waiting for the 67-72 truck parts.

[toddoky]

Originally Posted by indymachinist

Still waiting for the 67-72 truck parts.

Yeah, I would personally like to see that one tackled next.

[Advanced Design]

Originally Posted by indymachinist

Still waiting for the 67-72 truck parts.

I would vote for that too!

[Advanced Design]

Todd,

Thanks again for the measurements. Today I was able to try the downpipes and it looks like they will work for my application.

It would be helpful for a lot of builders if Holley could provide the dimensions for all the downpipes, as you provided for me above, in product listings.

Also, these downpipes had a lot of sanding debris left in the pipe. I don't know if all of them produced are the same .... and someone somewhere is going to miss cleaning out the debris. My concern would be the debris could migrate back into the engine or possibly contaminate an O2 sensor. The instructions with the down pipes didn't advise to check or clean them. Perhaps they could be revised.

Or better yet the production process could include a cleaning as one of the last steps.

Just some suggestions for continuous improvement.

[toddoky]

Originally Posted by Advanced Design

Todd,

Thanks again for the measurements. Today I was able to try the downpipes and it looks like they will work for my application.

It would be helpful for a lot of builders if Holley could provide the dimensions for all the downpipes, as you provided for me above, in product listings.

Also, these downpipes had a lot of sanding debris left in the pipe. I don't know if all of them produced are the same .... and someone somewhere is going to miss cleaning out the debris. My concern would be the debris could migrate back into the engine or possibly contaminate an O2 sensor. The instructions with the down pipes didn't advise to check or clean them. Perhaps they could be revised.

Or better yet the production process could include a cleaning as one of the last steps.

Just some suggestions for continuous improvement.

I will indeed forward your comment about the grinding dust inside the tubes to the production department.

As far as dimensions of the adapters goes, I supplied you with those measurement as a courtesy as a fellow member here, but it's not something we will be doing overall since all of the new Hooker LS swap components are application-specific by design and not intended for use as universal fit components.

Providing measurements is troublesome as they can be misinterpreted by a user and cause poor fitment and brand impressions, or prompt calls to the tech service department asking for a similar pipe to be made for them that has an additional 2 degrees of bend in it or some more rotation between the bends...I think you can see what a can of worms it opens up. Universal parts usually have a high ratio of returns associated with them and just doesn't represent the direction of development for new Hooker products these days.

Guys like yourself giving first-hand use experience with using Hooker parts on custom applications is far more valuable to a potential user I believe.

[Advanced Design]

Originally Posted by toddoky

I will indeed forward your comment about the grinding dust inside the tubes to the production department.

As far as dimensions of the adapters goes, I supplied you with those measurement as a courtesy as a fellow member here, but it's not something we will be doing overall since all of the new Hooker LS swap components are application-specific by design and not intended for use as universal fit components.

Providing measurements is troublesome as they can be misinterpreted by a user and cause poor fitment and brand impressions, or prompt calls to the tech service department asking for a similar pipe to be made for them that has an additional 2 degrees of bend in it or some more rotation between the bends...I think you can see what a can of worms it opens up. Universal parts usually have a high ratio of returns associated with them and just doesn't represent the direction of development for new Hooker products these days.

Guys like yourself giving first-hand use experience with using Hooker parts on custom applications is far more valuable to a potential user I believe.

Now that you mention it, can I have these just one inch shorter....I am jesting. Since practically everything I have touched on the last two builds requires extensive fabrication, I am thrilled to have parts that will work without hours of modification. So again, I appreciate the dimensions you provided me.

And at same time, I certainly understand how many people would misunderstand fitment dimensions, wanting custom modification for mass produced prices / capabilities. Then be upset with the company when they can't have it.

Thanks again for all your support.

[BMaine]

Holley must be really busy, 5 to 6 week wait for headers.

[toddoky]

Originally Posted by BMaine

Holley must be really busy, 5 to 6 week wait for headers.

Yes, we are quite busy these days and back orders do arise from time to time. what specific version of the headers are you considering?

[toddoky]

Originally Posted by BMaine

Holley must be really busy, 5 to 6 week wait for headers.

Yes, we are quite busy these days and back orders do arise from time to time. what specific version of the headers are you considering?

[BMaine]

I ordered the 70101504-1HKR model back on 3/19 and I called Holley yesterday because my order still said processing and was told none will be shipped until 4/28. I'm not really in a hurry because my build doesn't start till mid May. Is there a back order for exhaust part 70501415-RHKR? If so I should order soon. Thanks for your help.

[toddoky]

Originally Posted by BMaine

I ordered the 70101504-1HKR model back on 3/19 and I called Holley yesterday because my order still said processing and was told none will be shipped until 4/28. I'm not really in a hurry because my build doesn't start till mid May. Is there a back order for exhaust part 70501415-RHKR? If so I should order soon. Thanks for your help.

I don't readily have the ability to access order status or production schedule information as I work in the engineering department. If you are interested in the exhaust system, I would order it sooner than later as orders are filled in the order that they are received.

[BMaine]

On the Holley website there is a note that says the exhaust doesn't fit on trucks with the 56" long leaf springs. Is that for both rear and side exit pipes?

[toddoky]

Originally Posted by BMaine

On the Holley website there is a note that says the exhaust doesn't fit on trucks with the 56" long leaf springs. Is that for both rear and side exit pipes?

Yes, the exclusion is applicable to both exit styles. The rear spring perch location on trucks with the 56" springs is directly in the path of the designed frame attachment point of the tailpipe hangers of the Hooker exhaust systems. If you wanted to install either system on a truck equipped with such springs, you would have to fabricate new hangers that attach in a different location.

[BMaine]

I got my headers last week. Just thought I'd post a picture of them. 1 7/8" primary, mild steel with ceramic coating.

[Misled]

toddoky,
Are power steering hoses available or suggested for use withn the accessory kit? (forgive me if it is in the paperwork....I didn't see it)

Thanks,

Barry

[toddoky]

Originally Posted by Misled

toddoky,
Are power steering hoses available or suggested for use withn the accessory kit? (forgive me if it is in the paperwork....I didn't see it)

Thanks,

Barry

No, there's no particular PS hoses called out in the instructions of any of the components...the lab tech who does all the final assembly of our swap projects normally makes custom hoses using Aeroquip fittings and hose.

[Misled]

Originally Posted by toddoky

No, there's no particular PS hoses called out in the instructions of any of the components...the lab tech who does all the final assembly of our swap projects normally makes custom hoses using Aeroquip fittings and hose.

You should smuggle (or at least have them sell) me a set!!!!

[toddoky]

Originally Posted by Misled

You should smuggle (or at least have them sell) me a set!!!!

The fittings he uses are are the re-usable type, so you can obtain and use the same parts he did.

[Misled]

Originally Posted by toddoky

No, there's no particular PS hoses called out in the instructions of any of the components...the lab tech who does all the final assembly of our swap projects normally makes custom hoses using Aeroquip fittings and hose.

This is what I put together using stock lines.....

[Roaddogg]

Does anyone know if the Holley engine mounts and crossmember will work for a 6l90e transmission on a 2wd C10 with low hump?

[Houston Ben]

Todd,
how much better is the flow of the cast iron headers than stock truck, tbss, or Camara manifolds?

Thanks

[toddoky]

Originally Posted by Houston Ben

Todd,
how much better is the flow of the cast iron headers than stock truck, tbss, or Camara manifolds?

Thanks

There's never been any comparative testing done between those various manifolds at Holley, but I can tell you the Hooker manifolds were modeled after (but more tightly tucked to the engine) the geometry of the 2010-up Camaro manifolds and would offer similar performance as them.

[reaper71]

Have a question...I picked up a set of the cast manifolds for a customer job and I am having a heck of a time finding the gasket to fit the s.s flange that comes with the manifolds.
On the website it states 2010 camaro exhaust gasket will fit.
I have ordered 4 different sets and are all the same (center to center on flange is 3 3/4") and the gaskets are 4 3/8" and the round portion that is supposed to fit into the groove on the s.s flange is way bigger.
Any help would be appreciated.

Thanks Mark.

[foamypirate]

Originally Posted by reaper71

Have a question...I picked up a set of the cast manifolds for a customer job and I am having a heck of a time finding the gasket to fit the s.s flange that comes with the manifolds.
On the website it states 2010 camaro exhaust gasket will fit.
I have ordered 4 different sets and are all the same (center to center on flange is 3 3/4") and the gaskets are 4 3/8" and the round portion that is supposed to fit into the groove on the s.s flange is way bigger.
Any help would be appreciated.

Thanks Mark.

If you look up the instructions on the Holley website, it has part numbers for the gaskets.

[toddoky]

Originally Posted by reaper71

Have a question...I picked up a set of the cast manifolds for a customer job and I am having a heck of a time finding the gasket to fit the s.s flange that comes with the manifolds.
On the website it states 2010 camaro exhaust gasket will fit.
I have ordered 4 different sets and are all the same (center to center on flange is 3 3/4") and the gaskets are 4 3/8" and the round portion that is supposed to fit into the groove on the s.s flange is way bigger.
Any help would be appreciated.

Thanks Mark.

The GM manifold outlet gasket referenced in the instructions is part number 92202326, is that the gasket you've ordered/received?