C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
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Old Oct 14, 2019 | 08:16 PM
  #21  
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Originally Posted by Speedy007
Ebay ...There is a seller look for this description 243 gm performance heads. They have a 6 month warranty to match as well Here’s all I could grab from my eBay castings are as described 243! In the item description it will and should state gm performance head!! Those are the light weight sodium valves they do not come with valves I bought zz performance hardened push rods stock length you will find them good luck looking !
those will be from a truck or suv and not the 5.7 ls6 from a corvette. Thsy will have the d shape exhaust port
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Old Oct 15, 2019 | 09:20 AM
  #22  
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truck heads are fine if those are true GM pieces Ill grab those, hope they arent knockoffs.
Looking to add more punch to my truck and dont feel its worth spending on afrs for for DD usage
Thanks speedy Ill look into them

Last edited by cv67; Oct 15, 2019 at 09:23 AM.
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Old Oct 15, 2019 | 09:56 PM
  #23  
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I meant to say earlier up top roughly 700 per side. You will need both sides. And transfer out your coolant plug from your old heads. Passenger side is were the plug should be. You will also need push rods so ya I spent over 1600 on my heads I’m not really sure if I actually gained anything over my original 853
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Old Oct 16, 2019 | 09:30 AM
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Ill look into it thanks...I do my own porting so picking things up comes cheap for me.
Even 1500 for a new GM pair is better than rebuilts, most places skip guides do lousy valve jobs and hand them back off to you.

Last edited by cv67; Oct 16, 2019 at 06:31 PM.
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