Gen III numbers

PittSpeed Automotive
1

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

2

:gives: :gives:

3

sweet , thats just the thing i was looking for to finish my project.:rolleyes:

4

:dunno: :dunno: :confused: :confused:

5

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:

6

sweet i guess

7

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

8

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??

9

he said that he had the whole LS6 motor after the dealer blew the engine they put that in free of charge… cause you know how nice dealers are:bluez28:

10

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 charge… cause you know how nice dealers are:bluez28:

ahh sorry my bad man!!! never herd that one!!

yeah thats :bsflag:

11

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 charge… cause you know how nice dealers are:bluez28:

i would of blown my motor on purpose then…there is only like a 3,000 dollar price difference