john563

iTrader: (17)

how do you thinks these will stack against your stage 2.5 5.3 heads

TransAmMarathon

Hmm those do look good!

Zmg00camaross

iTrader: (11)

In for some dyno numbers, Track numbers perferred.

lazaris

iTrader: (5)

Whats the deck thickness on these? Will they work with aftermarket valve train (T&D Jesel)? How big of a spring pocket will it have?

MJs1FastSS

iTrader: (149)

can you PM me a release date and flow specs on a 4.020 or 4.030 bore once available thanks

Rise of the Phoenix

iTrader: (27)

Nice to see another viable "As Cast" option out there. My advise would be to price them under what the TFS "As Cast" heads sell for and you will for sure have a great selling head.

Jason 98 TA

iTrader: (4)

I do not plan on selling lower than the TFS cylinder head. The PRC head will come with a double PRC spring, cnc machined chambers, & guides. As well as 320cfm capability!

Nobodies as cast is even in the same ballpark right now!

Rise of the Phoenix

iTrader: (27)

That is great to hear. If my wallet allows, I'd like to get some of your guy's PRC 215 heads, but if not, it's nice to have another option out there. You guys keep on pushing the LS limit and I love it. Keep up the good work.

Bobby G

iTrader: (13)

So how much are these going to be price wise, and how long will it be before we see these out

tillery

iTrader: (4)

Great looking product. But the TF 220 also comes with a dual spring (TEA GOLDS) and they can be worked to flow the same. Main difference with yours is that it has additional bolts for more clamping. Well for the blocks that have those provisions. Priced within 100-150 more than the TF would be reasonable. But how about a good single spring for those who dont require a dual?

Jason 98 TA

iTrader: (4)

We are considering a single & dual option. These heads are designed not to need to be hand worked to move air. They will be 320cfm capable out of the box.

venom ws7

iTrader: (13)

Like always great products and work guys
I just recieved PRC LS3 250cc heads last night dyno results coming very soon they look awesome BTW

venom ws7

iTrader: (13)

Dp...

redsilv

how about the flow chart?
Im curious how much low to mid lift were looking at

Fbodyjunkie06

iTrader: (10)

Big claims saying they are as good as the TFS. Even bigger claim saying they are better. I'd like to see some dyno numbers and/or flow comparisons first.

That being said it looks like a great program you guys have for them. I'm sure they will be as good no doubt.

MJs1FastSS

iTrader: (149)

I am waiting for the release myself and curious to the flow data once released. I am interested in a 4.00+ bore head for my 370 and these sound great subcribing.

tillery

iTrader: (4)

Since I already have a set of TF220 And your 2.5 LS6 heads. Three popular cams from different vendors (2 NIB) and and two different rockers (stock/yella terra UL). If yall are interested in a few comparison I have extra parts to do so. I dont have the time is all cause of work. Im running the MS3 with TF 220 with a bad tune. But it still screams! With a good tune I would be interested in the out come. Swapping heads isnt hard. Plus I have head studs to make a swap a little cheaper/easier.

Fbodyjunkie06

iTrader: (10)

I'd like to see this.

carnine

iTrader: (6)

any word about these? any real comparisons?

06X6spdGTO

iTrader: (6)

Ive got some stock TFS 220 AS Cast LS1's I will be putting on this:
https://ls1tech.com/forums/carburete...-10-5x-et.html

Texas Speed! Send me a set around April and I will install them to track test them for ya!
Stock bottom End LQ9 using TFS LS1 220 2.04/1.57 heads vs your 3.900 PRC 220 As Cast. Let's see the ontrack results!!

No Tricks Just a head swap!

Out of the Box Trickflow 220 vs PRC 220

Using Stock Trunion Upgraded rockers on both, same cam for both, same bolt ons! Only thing more equal would be 64cc vs 64cc