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Old May 31, 2006 | 03:54 AM
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Default GM CNC LS6 heads

Was digging around and found that GM high performance offers cnc ported LS6 heads for $1500. I was wondering if any one had these or knows how good they are or about how much hp they will make. Its going on a 2004 GTO and will most likely be paired with a lingenfelter GT2-3 cam.

Thanks,
Mike
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Old May 31, 2006 | 03:59 AM
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never seen them but im sure a set from tsp or another vendor would be a better piece and save you some money
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Old May 31, 2006 | 04:05 AM
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wow where did you find this?
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Old May 31, 2006 | 04:34 AM
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Originally Posted by smok'nZ
wow where did you find this?
seen it at a few different places, most likely get it from lingenfelter. I think its there CNC program the the heads use.

http://www.lingenfelter.com/store/88958665.html

I looked at other heads, but 2200+ for AFRS are out of my budget. I want a mild sleeper with stock drivability and reliabliity.
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Old May 31, 2006 | 04:50 AM
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My buddy put 'em on his 2002 SS. I can't remember the cam (224/228?). He also went with 4:10 gears. Numbers were well over 400 hp. Very good street manners. 12.5 ish 1/4mi. time on street tires.
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Old May 31, 2006 | 04:50 AM
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Originally Posted by RMH_GTO04
seen it at a few different places, most likely get it from lingenfelter. I think its there CNC program the the heads use.

http://www.lingenfelter.com/store/88958665.html

I looked at other heads, but 2200+ for AFRS are out of my budget. I want a mild sleeper with stock drivability and reliabliity.
The GM Performance Parts fully CNC ported aluminum LS6 cylinder heads provide excellent performance with an unbelievable price tag. These heads flow over 300 cfm at .550” lift and come fully assembled and ready to install with ZO6 lightweight valves and 02 ZO6 springs. This version #88958665 has 65 cc combustion chambers. You should check pushrod length and intake port alignment during installation.

Also available in 60.9 cc combustion chambers # 88958622.

For street applications the GT2-3 camshaft works great in combination with these cylinder heads. Priced each $1,140.80

direct quote from the link you provided
so the afr's would be cheaper .
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Old May 31, 2006 | 04:55 AM
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Originally Posted by Jpr5690
never seen them but im sure a set from tsp or another vendor would be a better piece and save you some money
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Old May 31, 2006 | 11:16 AM
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I am currently running these heads, got them for less then a 1/3 of what they sell for! Only downside is how big they are(245cc intake runner) for a 346. Great heads, makes great power, and thats that. Also, mine are the 60.07cc heads
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Old May 31, 2006 | 11:48 AM
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I just finished building a 408 with these heads they flow excellent.
495rwhp and 470rwtq
I had the smaller cc heads on my ls1 and the hot cam= 402rwhp and 372rwtq
I'm not sure how big that lingenfelter cam is but the hot cam is small @219/228 525 lift
Scoggin dickey has those alot cheaper 995.00
www.sdpc2000.com
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Old May 31, 2006 | 11:49 AM
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They do have a large run in the 240's. We can do you a set of new 243 castings CNC ported assembled with LS6 springs and 2.00"/1.55" (non-sodium) valves, with a 227 +/- intake runner for only $875.00 per pair shipped to you anywhere in the US.
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Old May 31, 2006 | 12:27 PM
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Originally Posted by Gunnar@Patriot
They do have a large run in the 240's. We can do you a set of new 243 castings CNC ported assembled with LS6 springs and 2.00"/1.55" (non-sodium) valves, with a 227 +/- intake runner for only $875.00 per pair shipped to you anywhere in the US.
$875.00 for a pair not each WOW that is cheap
And there actual 243 casting and not ls6 style
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Old May 31, 2006 | 12:33 PM
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Originally Posted by Badls6SS
$875.00 for a pair not each WOW that is cheap
And there actual 243 casting and not ls6 style
243 castings ARE LS6 heads...What is LS6 style?

Andrew
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Old Jun 1, 2006 | 11:55 AM
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Would I have any problem passing emissions with these heads and the lingenfelter GT2-3 cam?
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Old Jun 1, 2006 | 12:30 PM
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Originally Posted by Badls6SS
$875.00 for a pair not each WOW that is cheap
And there actual 243 casting and not ls6 style

Brand new 243 castings, price is per pair.
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Old Jun 1, 2006 | 03:56 PM
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Originally Posted by RMH_GTO04
Would I have any problem passing emissions with these heads and the lingenfelter GT2-3 cam?

Lingenfelter does nothing but emmision legal cars so I would say it would pass!!
By the way, I am running their LS6 heads and GT1-1 cam, 484 hp/ 440tq via a 383 stroker on an Ed Wright tune, recently installed Kook's 1 7/8 LT'S/ORY and had it retuned by Chad @GreenlightMotorsports...should be over 500 HP and 450 TQ now.
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Old Jun 1, 2006 | 06:13 PM
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Do they have flow numbers? I remember some of the old LPE portings stalling out at .550 or so. If you are running a .581 cam, I would make sure the heads flow up that point.

-Geoff
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