# Gen III numbers **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [January 13, 2004, 10:12am UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362 "2004-01-13T10:12:56Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Streetnstrip](https://avatars.discourse-cdn.com/v4/letter/s/7bcc69/32.png) [@Streetnstrip](https://forums.speedlife.net/u/Streetnstrip)\ **Post date:** [January 13, 2004, 10:12am UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/1 "2004-01-13T10:12:56Z")
Here is a list of a few casting #'s: 853 97-00 aluminum 5.7 241 01-03 aluminum 5.7 243 LS6 aluminum 5.7 852 and 706 99 and up 4.8-5.3 truck heads 873 99-00 LQ4 6.0 iron heads 317 01 and up LQ4 6.0 aluminum heads 035 02 and up LQ9 6.0 aluminum heads Even more info: Casting Number 241 Head: 1997+ LS1 5.7 Litre Passenger Car Material: Aluminimum Part Number: 12559853 (1997-98) 12559853 (1999-00) (not sure why same PN) 12564241 (2001-03) Combustion Chamber Volume: 66.67cc Compression Ratio: 10.1:1 Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 2.00 inches Exhaust Valve Diameter: 1.55 inches Casting Number 243 Head: 2001 LS6 5.7 Litre Passenger Car Material: Aluminimum Part Number: 12564243 Combustion Chamber Volume: 64.45cc Compression Ratio: 10.5:1 Intake Port Volume: 210cc Exhaust Port Volume: 75cc Intake Valve Diameter: 2.00 inches Exhaust Valve Diameter: 1.55 inches Casting Number 706 Head: 1999+ LR4 4.8 Litre Truck 1999+ LM4 /LM7 5.3 Litre Truck Material: Aluminimum Part Number: 12559852 12561706 Combustion Chamber Volume: 61.15cc Compression Ratio: 9.5:1 Intake Port Volume: 200cc Exhaust Port Volume: 70cc Intake Valve Diameter: 1.89 inches Exhaust Valve Diameter: 1.55 inches Casting Number 373 Head: 1999-2000 LQ4 6.0 Litre Truck Material: Cast Iron Part Number: 12561873 Combustion Chamber Volume: 71.06cc Compression Ratio: 9.5:1 Intake Port Volume: 210cc Exhaust Port Volume: 75cc Intake Valve Diameter: 2.00 inches Exhaust Valve Diameter: 1.55 inches Casting Number 317 Head: 2001+ LQ4 6.0 Litre Truck Material: Aluminimum Part Number: 12572035 Combustion Chamber Volume: 71.06cc Compression Ratio: 10:1 Intake Port Volume: 210cc Exhaust Port Volume: 75cc Intake Valve Diameter: 2.00 inches Exhaust Valve Diameter: 1.55 inches ---
**Author:** ![BlkP42E](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/blkp42e/32/5938_2.png) [@BlkP42E](https://forums.speedlife.net/u/BlkP42E)\ **Post date:** [January 13, 2004, 10:17am UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/2 "2004-01-13T10:17:31Z")
:gives: :gives: ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\ **Post date:** [January 13, 2004, 4:44pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/3 "2004-01-13T16:44:11Z")
sweet , thats just the thing i was looking for to finish my project.:rolleyes: ---
**Author:** ![slowcamaro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/slowcamaro/32/5975_2.png) [@slowcamaro](https://forums.speedlife.net/u/slowcamaro)\ **Post date:** [January 13, 2004, 4:50pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/4 "2004-01-13T16:50:51Z")
:dunno: :dunno: šŸ˜• šŸ˜• ---
**Author:** ![Streetnstrip](https://avatars.discourse-cdn.com/v4/letter/s/7bcc69/32.png) [@Streetnstrip](https://forums.speedlife.net/u/Streetnstrip)\ **Post date:** [January 13, 2004, 6:40pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/5 "2004-01-13T18:40:55Z")
> _Originally posted by Vapor Trail_ > **sweet , thats just the thing i was looking for to finish my project.:rolleyes:** > why did u finally grow up and buy something fast for once:cool: ---
**Author:** ![snowhitejolf95](https://avatars.discourse-cdn.com/v4/letter/s/e19b73/32.png) [@snowhitejolf95](https://forums.speedlife.net/u/snowhitejolf95)\ **Post date:** [January 13, 2004, 7:00pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/6 "2004-01-13T19:00:10Z")
sweet i guess ---
**Author:** ![flyinglow57](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/flyinglow57/32/5978_2.png) [@flyinglow57](https://forums.speedlife.net/u/flyinglow57)\ **Post date:** [January 13, 2004, 7:15pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/7 "2004-01-13T19:15:59Z")
well i wish i had this info when bluez28 still had his SS cause this would have come in handy to prove to him that he didnt have a LS6 motor ---
**Author:** ![imported\_SINISTER](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_sinister/32/5970_2.png) [@imported\_SINISTER](https://forums.speedlife.net/u/imported_SINISTER)\ **Post date:** [January 13, 2004, 7:19pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/8 "2004-01-13T19:19:26Z")
> _Originally posted by flyinglow57_ > **well i wish i had this info when bluez28 still had his SS cause this would have come in handy to prove to him that he didnt have a LS6 motor** damn! block ls6 block not a whole motor?? ---
**Author:** ![flyinglow57](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/flyinglow57/32/5978_2.png) [@flyinglow57](https://forums.speedlife.net/u/flyinglow57)\ **Post date:** [January 13, 2004, 7:32pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/9 "2004-01-13T19:32:18Z")
he said that he had the whole LS6 motor after the dealer blew the engine they put that in free of chargeā€¦ cause you know how nice dealers are:bluez28: ---
**Author:** ![imported\_SINISTER](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_sinister/32/5970_2.png) [@imported\_SINISTER](https://forums.speedlife.net/u/imported_SINISTER)\ **Post date:** [January 13, 2004, 7:43pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/10 "2004-01-13T19:43:39Z")
> _Originally posted by flyinglow57_ > **he said that he had the whole LS6 motor after the dealer blew the engine they put that in free of chargeā€¦ cause you know how nice dealers are:bluez28:** ahh sorry my bad man!!! never herd that one!! yeah thats :bsflag: ---
**Author:** ![slowcamaro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/slowcamaro/32/5975_2.png) [@slowcamaro](https://forums.speedlife.net/u/slowcamaro)\ **Post date:** [January 13, 2004, 7:54pm UTC](https://forums.speedlife.net/t/gen-iii-numbers/163362/11 "2004-01-13T19:54:03Z")
> _Originally posted by flyinglow57_ > **he said that he had the whole LS6 motor after the dealer blew the engine they put that in free of chargeā€¦ cause you know how nice dealers are:bluez28:** i would of blown my motor on purpose thenā€¦there is only like a 3,000 dollar price difference