wonder why it was flowed using a LS1 bore size.

 

I dont know. Everytime I have seen the 5.3 heads flowed it was always on a 3.9" bore. I have never seen one flowed to the correct bore size.

 

you shave any off the deck?

 

.020 and I may take another .005 off before I have them put on.

 

Reaper,

I'm gonna bug you one more time. Did they come assembled?

Thanks.

 

No, I just got the valve seals sent with them. I already have the springs and all, that I can take off of my stock heads. No sense in paying for all of the stuff twice.

 

any updates???

 

Those look alot like my homeported heads. You didnt have a valve job done did you? That is the only thing I didnt do to mine that I wish I would have done. I am curious to see how they do for you as well.

 

Yeah, they done a valve job on them too. I will be taking it to the dyno saturday to see how much they helped. I really couldnt feel any difference after installing them, but my *** dyno is not accurate at all. I also couldnt feel the power from my headers, and cam, but its there. Im waiting to see what 12sec.5.3 put down. I am shooting for around 320 hp and 330 tq.

 

I am very interested in what you put down sat. You, me and 12sec5.3 all have about the same setups so I may have to strap mine down soon just to see how we all compare.