i have a 2000 z28 i swaped to the 317 heads i was almost finished but when i went to put the valve covers on last night i realized that the 317 heads are not center bolt like my stock heads. does anyone know where i can get some valve covers that will fit or if someone has some???
thanks
john

 

try car-parts.com

 

could not find it. what all did the heads come on???

 

the only thing that i found was on a 97 corvette 98 camaro 98 escalade

 

They are perimeter bolt?

 

I think those heads are more common to truck engines LQ4 and LQ9's.. they have larger camber 72cc vs the LS1/2/6 64cc.

Question, why did you chose these heads ? Not sure but maybe the 97-98 LS1 valve cover might fit (anyone ?)

Some guys use them with Turbo or superchargers. If you have not ported, milled or modify them, I would expect to see a drop of HP/TQ.

 

They are 6.0l heads. I run them on my Z for nitrous.

 

they are really ported. not sure who ported them but he said a lil over 300 cfm. they have been milled quiet a bit too to bump the compression back up.

orangeapeel
how much hp are you making, if you dont mind me asking pm me if you want.

yes they are perimerter bolt

 

317s that are perimeter bolt.. the ones we have are center.. something sounds fishy

 

what do u mean fishy??? it says 317 on the head

 

dude pm me asap. i have a set in good condition and I am DYING for a set of centerbolt. I will trade.

 

My 98 corvette are perimeter bolted.You would finds some easy on the corvette
forum.You would also be able to sell yours for more .That is if both cars valcovers are the same.If they are the same i would be interested in your centerbolt ones.
Good luck
Greg

 

i just bought some about 2 hours i will sell you mine for 45 shipped

 

I think yak is first in-line,pm him,if he dosen't want them and they will fit a vette i will take them.
Greg

 

Must be an early production thing. My 06 LQ4 317s are center bolt.

 

yeah, he already has a pm about them.

 

great price!

 

I think that the older iron 317's were perimeter bolts. The newer aluminum ones should all be center bolt.

 

yep thats the way they started doing them

 

John glad you got the covers, good luck with your car.