General Specifications:

Displacement: 5.7L (5665cc, 346ci)
Bore/Stroke: 3.90 / 3.62
Compression Ratio: 10.1:1
Maximum RPM: 6200
Firing Order: 1-8-7-2-6-5-4-3
Out of crate weight: Approximately 390 lbs.
Spark Plug: ACDelco 12 - ACDelco 41-985
Spark Plug Gap: .060”, 1.524 mm

Block Specifications:

Block Material: 319-T5 Aluminum
Block Description: 90°V, Deep skirt with cast-in iron sleeves.
Bore Spacing: 4.40”
Deck Height: 9.24”
Main Bearings: 5
Thurst Bearing: Center Bulkhead
Bearing Caps: 4 vertical bolts, 2 cross bolts

Cylinder Head Specifications:

Material: 356-T6 Aluminum
Description: Cross flow, wedge combustion chamber.
Ports: Symmetrical, intake and exhaust
Chamber Volume: 67.3 cc
Head Gasket: 0.052” compressed

Crankshaft Specifications:

Material: Cast Nodular Iron
Features: Undercut and rolled fillets.
Crank Pin Diameter: 2.10”
Main Bearing Diameter: 2.56”

Piston Specifications:

Material: Cast Aluminum
Description: Strutless, flat top.
Compression Ht.: 1.34”
Weight: 15.5 oz.

Induction System:

Manifold: One-piece composite.
Throttle Body: 75.0 mm bore dia.

Stock LS1 Heads:

Chamber: 66.67 cc
Intake Port Volume: 200 cc
Exhaust Port Volume: 70 cc
Valve Diameter Intake: 2.00"
Valve Diameter Exhaust: 1.55"

Stock LS1 Camshaft:

1998 - 2000 F-body
202 / 210 int/exh @ 0.05" Duration
0.496" / 0.496" int/exh Lift
116 LSA

2001 - 2002 F-body
197 / 207 int/exh @ 0.05" Duration
0.467" / 0.479" int/exh Lift
116 LSA