LS 1 gen III
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LS 1 STAGE Ι

  • s.t.d. intake and exhaust valves
  • 217cc intake port volume
  • 85cc exhaust port volume
  • 57cc chamber volume

Valve lift

.100”

.200”

.300”

.400”

.500”

.550”

.600”

Intake c.f.m.

77

144

213

259

262

264

265

E xhaust c.f.m

54

113

158

191

206

210

213

LS 1 STAGE ΙΙ

  • Requires installation of larger intake inserts
  • Intake valve 2.080 exhaust valve 1.575
  • 232cc intake port volume
  • 91cc exhaust port volume
  • 57cc chamber volume

Valve lift

.100”

.200”

.300”

.400”

.500”

.550”

.600”

.650”

Intake c.f.m.

72

141

203

256

291

302

314

318

E xhaust c.f.m

57

113

158

191

206

210

213

220

cylinder heads