PRC 220cc 5.3L Stage 2.5 CNC Ported Heads

[farmtruc]

These heads are practically brand new! We installed them on a HO 5.3L, then the same day, we decided to install a Turbo on this truck; being that this truck came with 10.5cr stock, compression may have been to high. So, another set of heads were decided on.
No issues with these heads, and when you receive them, you'll see how much use they actually have. Honestly, these heads only have about 3 hours of drive time on them.

$900 takes them, FREE SHIPPING! Tell your significant other about these heads, it'll be a great xmas present.



Item Detail
Name:
PRC 220cc 5.3L Stage 2.5 CNC Ported Heads
Item#:
199-PRC2.55.3

ALL NEW UPDATED Precision Race Components 5.3L stage 2.5 CNC ported cylinder heads. Dyno results have shown up to 50rwhp gains with the addition of these cylinder heads.


This all new 5.3l cylinder head program offers smaller sized runners, upgraded valves, & PRC Valve Springs! The all new cylinder head is a result of over 6 months of testing & tweaking in effort to offer the best combination of runner size, and value!
Side by side flow testing has shown over 15cfm improvement over a popular competitors 225cc as cast cylinder head! This cylinder head was designed to be the ultimate in bolt on cylinder head for customers wanting to keep pricing down with stock castings!
Intake Flow Information:
.300 208
.400 257
.500 290
.600 312

The PRC Cylinder Heads Feature:

• Brand New GM 5.3l Based Cores
• Smaller Combustion Chambers For 10.75:1 Compression
• Stainless Steel 2.04"/1.575" Valves
• PRC Double Spring Kit Complete With
  Springs, Titanium Retainers, Seats, & Seals
• Completely Assembled & Setup To Your Specs!

[the_jester]

what would these heads do on a 6.0? would they be alright? i am very interested.

[Melissa@NelsonPerformance]

what would these heads do on a 6.0? would they be alright?

No actually the bore on the 6.0 is too big.....so it wouldnt work
melissa

[the_jester]

i would like to get these

[Melissa@NelsonPerformance]

i would like to get these

pm sent

[xlr82sxs]

i'm very interested in these! have money in hand..

[06-crewhauler]

would u take in trade some lq9 patriot stage 2 heads with 72cc chamber

[farmtruc]

i'm very interested in these! have money in hand..

I have another guy that wants them too, you both answered the same time, i guess whoever calls first, lol.

would u take in trade some lq9 patriot stage 2 heads with 72cc chamber

i'd like to, but i'm trying to get rid of my inventory.


The compression usually raises to about 10.1 on a stock 5.3L. just right for the street!

[xlr82sxs]

what's stock compression on a l59 5.3 allen?

..and what kind of gains will i see from these heads on a stock 5.3 with lt headers and ory? i plan to go with a 218/224 high lift cam in the future as well.

[farmtruc]

what's stock compression on a l59 5.3 allen?

..and what kind of gains will i see from these heads on a stock 5.3 with lt headers and ory? i plan to go with a 218/224 high lift cam in the future as well.

I used to know all the specs, but somehow I forgot, lol.

It's around 9.1 or 9.5. I think the 6.0L is 9.1 and the 5.3L is 9.5.