| INTAKE PORT SIZE |
| Engine | Volume (cc's) |
| LS1 | 200 |
| LS6 | 210 |
| LQ4/LQ9 | 210 |
| LM4/LM7 | 190 |
| LR4 | 190 |
| LS2 | 210 |
| EXHAUST PORT SIZE(S) |
| Engine | Volume (cc's) |
| LS1 | 70 |
| LS6 | 75 |
| LQ4/LQ9 | 75 |
| LM4/LM7 | 70 |
| LR4 | 70 |
| LS2 | 70 |
| CHAMBER SIZE(S) |
| Engine | Volume (cc's) |
| LS1 | 66.67 |
| LS6 | 64.46 |
| LQ4/LQ9 | 71.16 |
| LM4/LM7 | 61.14 |
| LR4 | 61.14 |
| LS2 | 64.14 |
Valvesprings - beehive shape wound from 4.6mm-diameter chromium silicate (Cr-Si) ovate (oval-shaped) wire
Retainers - steel
Locks - 10-degree design, steelCamshaft - roller design made from 5150 steel billet shaft, gun-drilled with a 17mm hole for reduced mass.
Lifters - hydraulic roller, sets of four nested in a plastic carrier guide in order to guide and provide easy installation
Rockers - Investment-cast, stainless steel needle roller bearing pivot nested in investment-cast aluminum rocker arm stand
Pushrods - steel, 8mm-diameter, 0.075-inch-wall thickness
Head gaskets - '97-'98: sandwich design of graphite layers over steel core, '99-and-later: multi-level steel (MLS) gaskets.
Valve Angle - 15 degrees (versus 23 degrees of previous Chevy small-block)
Valve Seat Machined Angles - 30, 45, and 60 degrees to blend into chamber
Distance between Valve Guides - 48.6 mm (1.913 inches) on all heads