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Comparison Of ZZP Plog and Speed Daddy Headers

I have the stock flex in my sd's 3.5 years later. Crossover never gave me any issue and the port line up just like my zzp ones do. I'd go sd over anything else but that's because I'm cheap and easy lol
 


The PLOG that I had was garbage so even made in America from ZZP is not 100% good quality, the flange was welded on backwards so some of the stud bolts did not line up with the engine block and the flange also warped
 
tod1d said:
The PLOG that I had was garbage so even made in America from ZZP is not 100% good quality, the flange was welded on backwards so some of the stud bolts did not line up with the engine block and the flange also warped
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At least you had a vendor to help fix the issue china doesn't give full refunds
 
There is a bolt that if left in the head will hit the plog. Not sure if that's the issue.

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The bolt is under #5 spark plug holding heat shield. I ground the head of mine down to clear.
 
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RED Ya my Plog I had back when I was N/A cracked uncontrollably.. welded it up and it cracked again lol...that was a few years back so unless they changed their design.. garbage!
 
I am running a used re-welded zzp power log. I have had it on my car for 3 years and no new cracks as of yet. I saw this product on Jay Leno's Garage that looked interesting called "Lab Metal High Temp". It is a liquid metal puddy-like substance that you can coat on cracked manifolds, cross overs, headers, etc. to fill in and permanently seal the cracks. You coat it on less than 1/4 inch and let it air dry for 12 to 16 hours then you bake it by running the car for an hour to cure it. I am looking to test this product when my power log eventually cracks.

Here is the link to the video
http://youtu.be/RWisGeUpHHc

Just search for "lab metal high temp" on your favorite search engine and check for prices.

If anyone has a cracked manifold and would like to try this method of resealing please try it and let us know!
 
Wish I had a dyno close by for cheap. I am currently running a PLOG and 3" downpipe setup, and will be switching to headers very soon. Would be nice to get before and after dyno runs made...
 




97AutoXVette said:
Wish I had a dyno close by for cheap. I am currently running a PLOG and 3" downpipe setup, and will be switching to headers very soon. Would be nice to get before and after dyno runs made...
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I have a PLOG and 3" DP and I too am looking to move to headers.

Running an XP cam and 3.25" and 3.4" pulley right now and curious to see what difference the headers will make!
I want to get 1.75" ID primaries, so looking at ZZP and pacesetter headers.
 
Are you intercooled? What type of timing you running? I am actually pulling my headers and putting the plog dp on
 
Because I don't like leaky slip fit connections and want to go turbo at some point...so whether I actually go turbo or not just going to switch
 
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