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Common LT1 Part Numbers
Ignition:
1993-1994 optispark (non-vented style, spline driven) 10457702
1995-1997 optispark (vented style, cam dowel driven) 1104032
1995-1997 vented optispark vacuum hoses 12555323
1993-1994 optispark electrical harness 12106559
1995-1997 optispark electrical harness 12130319
1993 ignition coil 1115315
1994-1995 ignition coil 10477208
1996-1997 ignition coil 10489421
1993 ignition control module 10483131
1994-1995 ignition control module 10483139
1996-1997 ignition control module 10482803
Camshaft/Valvetrain
LT4 valve springs (set of 16) 12495494
LT4 Valve spring (1) 12551483
LT4 extreme duty timing set 12370835
LT4 Hotcam
LT4 1.6 roller rocker arm (1) 12557779
1993-1994 front cover (includes round seals) 12551636
1995 front cover (includes round seals) 12552426
1996-1997 front cover (includes round seals) 12552427
1993-1994 front cover opti seal 10128317
1995-1997 front cover opti seal 12552428
1993-1997 front cover crank seal 10128316
1993-1997 front cover water pump seal 10217886
1993-1997 front cover gasket 10128293
General Engine:
LT4 heads 12555332
LT4 Intake Manifold 12550630
Misc
F-body a/c delete pulley 10115875
1993-1997 water pump 12527741
1993-1997 water pump coupling 10128334
1993-1994 1LE intake elbow (no vent hole for opti) 25147210
1995-1997 1LE intake elbow (for vented opti) 25147187 $43.82
1994-1997 front flexible fuel supply lines 10258441 $15.38
PCM Related
1993-1995 knock sensor 10456126
1996-1997 knock sensor 10456287
LT1 Knock Module 94-95 OBD1 16217700
LT1 Knock Module 96-97 OBD2 16214661
LT4 Knock Module 96-97 OBD2 16214681
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