799 casting???

Reply Subscribe

Thread Tools

Search this Thread

Mar 24, 2005 | 02:15 PM

J-Rod

Thread Starter

6600 rpm clutch dump of death Administrator

Joined: Dec 2001

Posts: 4,983

Likes: 13

From: Texas

799 casting???

Anyone heard of a 799 cylinder heads casting? If so, do you have the specs on it?

Mar 24, 2005 | 05:08 PM

getlifted

Bad Seller Alert

iTrader: (2)

Joined: Jan 2005

Posts: 123

Likes: 0

Looked through all the gen 3 casting numbers and nothing on 799

Mar 24, 2005 | 06:17 PM

mr2guru

TECH Resident

iTrader: (16)

Joined: Dec 2004

Posts: 855

Likes: 1

From: Kansas City Area

Super secret head from deep inside GM's performance division. Only 5 sets known to exist.

j/k Hell I don't know but that sounded cool.

Mar 24, 2005 | 06:21 PM

o2haWK

Teching In

Joined: Jun 2004

Posts: 32

Likes: 0

From: Sunnyvale, CA

Quote:

Originally Posted by J-Rod

Anyone heard of a 799 cylinder heads casting? If so, do you have the specs on it?

I remember this guy was selling a pair of heads that had the 799 number....they look like LS6 heads to me. ....he said that they were the pre-production LS6 heads made in 1999 or 2000....dont know for sure though but woudnt doubt it..they looked dead on like LS6 heads...hopes this helps point you to the right direction...

Mar 24, 2005 | 08:25 PM

Classic

TECH Fanatic

iTrader: (3)

Joined: Sep 2002

Posts: 1,943

Likes: 0

From: NC

I've seen some odd casting number LS6 type heads that slipped out of GM, but can't remember the casting number.

Mar 25, 2005 | 12:44 AM

MichLT

Teching In

Joined: Feb 2005

Posts: 7

Likes: 0

From what I've read in the past, 799s are prototype/pre-production LS6 heads. Supposedly cast in Mexico and approximately 400 sets made. Whether they had the same components and all details of the casting identical, I don't know/doubt it...But for the mostpart, a LS6 head.

Mar 25, 2005 | 11:10 AM

427 LS1

FormerVendor

iTrader: (10)

Joined: Oct 2003

Posts: 206

Likes: 0

I've had numerous sets of these, they are early LS6 heads, everything being the same, ports and chambers. Dave

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Jan 2, 2006 | 09:41 AM

NO-OPTION-2002

TECH Apprentice

iTrader: (2)

Joined: Aug 2004

Posts: 372

Likes: 1

Quote:

my 05 Z71 with L33 5.3 has 799 heads on it.

That being the case, it is an LS6 style head. The part #s in the GM catalogs show the LS6, LS2, L33, LH6, LS4, and ALL 2007 4.8L, and 5.3L truck motors getting this same bare head. Looks like it's going to be easier to come across LS6 castings in the near future.

For ref. the bare head part # is 12564825.

Hope this helps!!

Reply Subscribe

799 casting???

799 casting???

Trending Topics

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die