01SOMZ28

iTrader: (37)

I just received these heads in the mail about 15 minutes. I was told time and time again that these were PRC stage 2.5 5.3 heads with PRC .650 springs and a 62-63cc chamber. I was also told that they had been ported/polished even more by a shop in Wisconsin which is where they were shipped from, although that is not who i bought them from. The seller had the heads at that shop since he said he was great friends with the shop owner and was having more work done to them so they would flow MORE then how they come from TSP and i'd be provided with a flow chart to show what these specific heads are flowing. I was provided with pictures before sending the money, but only pictures of the intake and exhaust ports....Upon opening the box i instantly noticed that there are no PRC markings on them anywhere and those are clearly not PRC .650 springs...let alone a dual valve spring. They look more like cleaned up stock springs to me. There is also no flow chart.

Can anyone tell if those chambers look like a 62-63cc? And what springs? Pretty sure they won't be good for a .614/.621 lift cam....

Rise of the Phoenix

iTrader: (27)

Only way to tell what cc they are is to measure.

RARON455

iTrader: (35)

They have definitely been worked on, I have a set of prc stage 2.5 5.3 heads, and no where on my head does it say prc, just some casting numbers of 853 and I believe there were a few other numbers stamped on them.

Sales3@Texas-Speed

iTrader: (2)

If you could figure out who originally ordered them, we may be able to shed some light on your situation. Just shoot me a pm or call us!

redsilv

I believe PRC .650 springs are double
If they lied to you about the springs maybe they told you
a story about them being PRC heads.
Not saying they arent good flowing heads,
The port/polish looks good to me.

But I would still be tempted to lay out a good ole fashion'
texas *** whoopin'

Why cant some people just be strait up and try to claim they
flow as good as PRC instead of selling something that isnt
I would be concerned as you.

Is there not any marking at all?
TSP dont mark there heads?
Can you fill the chamber to see what cc they are?
You might want to know how much they have truly been milled?

I feel uncomfortable for you man

sepsis

iTrader: (7)

Anyone that does head work should stamp them or something. A number or something that brings up a name and what was done and when.

RARON455

iTrader: (35)

Yup, MY springs are double not single.....

cyipher

iTrader: (1)

Looks to be a TI retainer, the only way to see what you have is to take them some where and have them check the numbers both on the springs, chambers, and flow data

01SOMZ28

iTrader: (37)

I talked to the guy who i purchased the heads from. He said he took the heads in on a trade from a tech member a while back. He sent the heads off to have them cleaned up, ported/polished a little more and flowed. He said it had been a while since he had saw the heads, so he called the shop that had the heads and they told him they were PRC springs (before i sent the money) Come to find out they're actually Comp behive springs which use a titanium retainer and stock seats.

The guy i purchased them from is making it right with me and sending me a set of Patriot .660 springs.

01SOMZ28

iTrader: (37)

But i always thought a PRC head had the casting number removed and PRC was cnc'd on the corner?

703 CAMAROSS

^^^ I'm sure if that was the case Jake would have said so. At least he's making it right and sending you springs. Sounds like you bought them from an honest guy and the shop is the one who made the mistake.

Sales3@Texas-Speed

iTrader: (2)

Some of the earlier heads had all the same/similar portwork done without removing the casting numbers and engraving our logo. Now we engrave our logo and serial number on just about every head that leaves our shop, unless the customer requests us not to. We do however, still have those older records of who bought what heads (what stage, valves, milling, etc...), so there is the possibility they could be ours. OP, If you do come up with a name or something shoot me a pm!

99Ls1fever

iTrader: (3)

Mine do, they say prc 2.5's I believe

SOMbitch

iTrader: (8)

My old set of 5.3's bought in early 07 had no PRC logo...

squirlNUTZ

What did you pay? The look nice from the photo

01SOMZ28

iTrader: (37)

$1k shipped with new gaskets and ls7 lifters.

smg267

iTrader: (23)

Ehh mystery parts. I bought my prc heads from tsp about two years ago. I prefer to buy new for all internals. You have no idea what people are selling anymore. I would rather pay the extra 400 and know what is going on my engine. Way to many people lie with cams etc... I can only imagine putting a stock cam in and stock 5.3 heads while expecting a ms3 5.3 combo.

prokilllsx

I don't know what to tell you. My set has PRC on them and double springs.

jbridwelltransam

iTrader: (12)

The guy from tsp just said that not all of them have that prc on them. Either find the name of the original orderer or have them measured.

01SOMZ28

iTrader: (37)

The gaskets are sealed in GM packages and so are the lifters, no mystery there.