4.3L to Ls1 in silverado 00

[RedHeartbeat]

All heads aluminum unless noted otherwise

GMPP = GM Performance Parts

The last three digits of the part number are the casting number.

1997+ LS1 5.7L Passenger Car
12559853 & 12564241 heads...
66.67 cc Combustion Chamber Volume
10.1 Compression Ratio
200 cc Intake Port Volume
70 cc Exhaust Port Volume
2.00" Intake valve
1.55" Exhaust Valve

2001+ LS6 5.7L Passenger Car
12564243 heads...
64.45 cc Combustion Chamber Volume
10.5 Compression Ratio
210 cc Intake Port Volume
75 cc Exhaust Port Volume
2.00" Intake valve
1.55" Exhaust Valve
D-shaped exhaust port

1999+ LR4 4.8L Truck
1999+ LM4/LM7 5.3L Truck
12559852 & 12561706 heads...
61.15 cc Combustion Chamber Volume
9.5 Compression Ratio
200 cc Intake Port Volume
70 cc Exhaust Port Volume
1.89" Intake valve
1.55" Exhaust Valve

1999-2000 LQ4 6.0L Truck
12561873 CAST IRON heads...
71.06 cc Combustion Chamber Volume
9.5 Compression Ratio
210 cc Intake Port Volume
75 cc Exhaust Port Volume
2.00" Intake valve
1.55" Exhaust Valve

2001+ LQ4 6.0L Truck
12562317 heads...
71.06 cc Combustion Chamber Volume
9.4 Compression Ratio
210 cc Intake Port Volume
75 cc Exhaust Port Volume
2.00" Intake valve
1.55" Exhaust Valve

LQ4 heads are good choices for forced induction

2002+ LQ9 6.0L Truck
12572035 heads...
71.06 cc Combustion Chamber Volume
10.0 Compression Ratio
210 cc Intake Port Volume
75 cc Exhaust Port Volume
2.00" Intake valve
1.55" Exhaust Valve
D-shaped exhaust port
Best for forced induction engines

GMPP "Gen-III Racing"
12480176 heads...
65.0 cc Combustion Chamber Volume
10.5 Compression Ratio
210 cc Intake Port Volume
65 cc Exhaust Port Volume
2.00" Intake valve
1.55" Exhaust Valve
D-shaped exhaust port

GMPP "Showroom Stock Racing"
25534321 heads...
63.0 cc Combustion Chamber Volume
10.8 Compression Ratio
200 cc Intake Port Volume
70 cc Exhaust Port Volume
2.00" Intake valve
1.55" Exhaust Valve

[Sleeper]

i think you forgot the 806 5.7L castings. thats what my TEA Stage 2's are i think.