New aftermarket LS3 heads.

[Jason 98 TA]

We're working on finishing some ports now. They absolutely will be in PRC castings. I expect our pricing will be the same as the cathedral heads!

[Kyle2k]

Originally Posted by danhr

TFS HEADS

correction: 12* valve angle

estimated price: 2500-2700 (THIS IS AN ESTIMATED PRICE, BUT THAT'S THEIR GOaL)

Release date: Not Jan. 1, it is the first quarter of 2011

Current status: They are still dyno testing the heads

The said flow numbers are obviously cnc'ed numbers, they are not as-cast

They will be offer different runner sizes down the road

You will have a choice of either wanting to run the ls3 or ls7 intake when ordering (there are two different sets of heads)

Intake valves are NOT hollow stem

If that is the case then they are still an afterthought to the mast heads

[Ovenmitt]

Originally Posted by Kyle2k

If that is the case then they are still an afterthought to the mast heads

The TFS heads actually (on paper) beat the mast heads in most of the area between .100 and .600 lift. I dont think you could go wrong with either. Updated post to include the mast heads

[danhr]

Originally Posted by Ovenmitt

The TFS heads actually (on paper) beat the mast heads in most of the area between .100 and .600 lift. I dont think you could go wrong with either. Updated post to include the mast heads

x2... and that mid-lift range is where it counts the most.... your valves spend a lore more time there, than at 600 lift.

Not saying the mast heads are not as good as the trick flows. Each cylinder head has it's pros and cons. You just gotta figure out which one has the most pros and the least cons for your setup.

and correct me if i'm wrong, but the mast motorsports heads are cnc'ed as well.

[Kyle2k]

Originally Posted by danhr

x2... and that mid-lift range is where it counts the most.... your valves spend a lore more time there, than at 600 lift.

Not saying the mast heads are not as good as the trick flows. Each cylinder head has it's pros and cons. You just gotta figure out which one has the most pros and the least cons for your setup.

and correct me if i'm wrong, but the mast motorsports heads are cnc'ed as well.

Sorry, the way you made it sound was that the cnc was an option, the mast heads flow those numbers the way they are sold. I guess I'm confused if cnc will will cost extra on the trick flows?

[danhr]

no. Cnc'ed means they were put through a cnc machining process after the heads were casted. Some trick flow heads (like the cathedral port ls1 ones) have this as an option. The ls3 ones come with the cnc STANDARD. This means that they have already been ported.... you can send them out to get ported even more, but won't have too much more room to grow.

Now if these heads flowed this amount AS CAST, and not cnc'ed, hands down this head would be one BAMF. Because you would have a lot of meat on the head to port and make them flow even more.

if you haven't noticed, I'm a little biased towards a certain brand. lol.

[Jason 98 TA]

AFR doesn't offer an LS3 head. That's a cathedral head.

I feel like I need to jump in and correct some information. Just because a port is as cast or cnc ported doesn't mean it will have any more "meat" to make them flow more. What the port does or doesnt look like has nothing to do with the amount of meat for porting. Just because a head has more meat also doesn't make the head better or worse. It's where material is & isn't that determines what a head flows or is capable of flowing.

[Jason 98 TA]

I wouldn't count out the TFS heads yet, checkout Hot Rod magazine's cathedral head test. They tested the MAST head next to the TSP cathedral, TFS cathedral, and AFR 245cc head. You can't just go off a claimed flow number when deciding what heads to run.

Originally Posted by Kyle2k

If that is the case then they are still an afterthought to the mast heads

[Kyle2k]

Originally Posted by Jason 98 TA

I wouldn't count out the TFS heads yet, checkout Hot Rod magazine's cathedral head test. They tested the MAST head next to the TSP cathedral, TFS cathedral, and AFR 245cc head. You can't just go off a claimed flow number when deciding what heads to run.

I was more so relating to cost because I thought the cnc was extra ontop of the price of the heads

[Ovenmitt]

Originally Posted by Jason 98 TA

AFR doesn't offer an LS3 head. That's a cathedral head.

I feel like I need to jump in and correct some information. Just because a port is as cast or cnc ported doesn't mean it will have any more "meat" to make them flow more. What the port does or doesnt look like has nothing to do with the amount of meat for porting. Just because a head has more meat also doesn't make the head better or worse. It's where material is & isn't that determines what a head flows or is capable of flowing.

It's designed to bolt to an LS3 and use LS7 hardware, regardless of it being a cathedral head. Obviously you'd need a unique setup to make it work and it wouldnt just bolt on and go

[Jason 98 TA]

Then every ls head ever built should be on this list. There are tons of great cathedral heads that will bolt on to the ls3 block. We are building a cathedral port that uses a ls3 rocker, but it's not really a ls3 specific head. It's a cathedral port head usingba offset rocker.

[Ovenmitt]

Good point, I think I'll maintain just the GenIV square ported heads on the list!

[Ovenmitt]

TSP heads are closer to be coming a reality. Stay tuned for some updated information in the next few days

[CC Performance]

These are some really nice heads.

Mast Motorsports Black Label LS3
Price: $2599 bare,
$2999 assembled with .650 lift beehive springs, stainless valves, and billet aluminum rocker stands.
Available: Now

*256cc
*2.165 intake valve, 1.600 exhaust
*69cc chamber
*11 degree valve angle
*Regular or 6 bolt LSX Bolt pattern
*4.000-4.070 bore
*Uses LS3 offset rockers/valvetrain


Advertised Flow Data w/4.000" Bore Plate

Lift Intake Exhaust
.100 74 61
.200 146 119
.300 222 188
.400 282 219
.500 330 236
.600 360 251
.700 372 260