Jason 98 TA

iTrader: (4)

Guys I'm finishing up the all new Version 2 of the PRC 5.3l Stage 2.5 cylinder heads!

These new PRC V2 5.3l heads will feature all new cnc maching, new ports, new chambers, & aftermarket rocker clearancing standard!

We're currently finalizing a larger 2.5R valve/port option for guys wanting 317cfm+ air flow from a $1400 a pair cyliner head!

Here's the pics of the new rocker arm clearance & PRC logo!






Here's the newly updated 5.3l intake port:





Here's the newly updated 5.3l exhaust port:





Finally the newly updated chamber:

CALL911

iTrader: (17)

Looks great Jason! Are you going to be offering these new heads with the cam combo just as you did with the old stage 2.5 PRC 5.3L heads? If so, what will be the new combo price as I had already planned on getting the Heads and Cam (MS3) combo from TSP in about another month, but if these are just slightly more, I will be all over them.

RealArmyMan

iTrader: (2)

X2

I'm doing the same combo in June and would also like to know how it's going to affect price.

firefighter813x

iTrader: (6)

when will these be available?

Beaflag VonRathburg

iTrader: (176)

Those look very nice. Thanks for the pictures. I like to save pictures of good port work. It gives me good ideas to emulate.

themachasy

iTrader: (5)

This is where my 5.3s will be heading when they get here! Looks GREAT!

Gun5

iTrader: (37)

how much will it be to bring the current 2.5's up to it?

GT Griller

iTrader: (8)

Badass Man!!!

01FbTaWs6

iTrader: (12)

looks very very nice

JimMueller

iTrader: (9)

+1 My heads are off the engine now, is it worthwhile to ship the heads I puchased in January of '07 back for an update?

T/A_GuS

iTrader: (4)

+1 on the new heads and Cam combo!!

Tell us when you are gonna do it!! Some badass heads like that deserve a badass special!!! lol

Midnight02

iTrader: (8)

I'm curious as to how these will work on a cam + full bolt on stock cube LS1 as compared to the Stage 2.5 LS6 head. Have you guys conducted any tests to compare the two?

I've done a LOT of research on the 5.3 heads and it sounds like you guys are still finding ways to squeeze a few extra HP out of an already solid set of heads!

phoenix1987

iTrader: (3)

This is gay. I just bought the 5.3s in March or Feb. Damn it. lol

wildta

iTrader: (1)

Can you tell me what is the highest valve lift you can use on these heads with say a 207/220 118.5 lca

thanks

HottLS1Z

iTrader: (5)

This is gay, I just got mine a few weeks ago, wonder how much better these new ones would be for my 383 build I'm doing?

ls1toy

dam i just bought my 5.3 head from you guys last week! crap i should of waited

joblo1978

iTrader: (14)

I'm also curious, I've been eying a TSP H/C package. What's the price difference and power difference?

oange ss

iTrader: (50)

what size chambers ? What runner size intake/exhaust ? Valve size ?

Jason 98 TA

iTrader: (4)

Guys the previous version of the 5.3l head is still very nice! I would not replace my older PRC 5.3l heads with the new version. Both setups work really well, we just updated the PRC heads with a few new features.

There's definately no doubt the leader in budget minded performance cylinder heads!

We're working on package pricing for the 2.5R 2.055 / 1.60 valve setup right now!!

CALL911

iTrader: (17)

Thats awesome news Jason! Do you have any preliminary estimates on how much better these will be over the 1st version? Are we really going to see a substantial difference like possible 10-20 more RWHP on ideal setups?