Lingenfelter L950075307 LSA, LS9, LS3, L92 cylinder head dowel pin locator tool v1.0 - Manual (Page 2)

Page 1.
Parts List
Lingenfelter LSA, LS9, LS3, & L92 Cylinder Head Dowel Pin Locator Tool
# Part number Description
1 XX03952-0018 Dowel pin drill fixture
2 8486A49 Drill bushing
2 47539-2 M6x1.0x70 SHCS
2 47393 M6 washer
1 8854A23 10mmx3/x1.000x2-11/16 square end mill
1 57485K68 10mm ID set collar
4 N/A Instructions
1 L920010000 LPE 9” decal
Tools & Materials Required
• 3/8” drill
• masking tape
• 5mm Allen key (or equivalent)
• 2.5mm Allen key (or equivalent)
Thank you for purchasing the Lingenfelter Performance Engineering (LPE) LSA, LS9, LS3, and
L92 cylinder head dowel pin locator tool. In order to assure that the rectangular port cylinder heads
are installed with the correct intake manifold, GM places a dowel pin on the intake manifold and
a matching dowel hole on the cylinder head itself. The location of this dowel pin will be different
depending on whether the engine is supercharged (i.e. LSA, LS9) or naturally aspirated (i.e. LS3,
L92). The LPE cylinder head dowel pin locator tool can be used to preceisely position and drill a new
dowel pin hole in a different position. For example, this tool could be used on naturally aspirated
LS3 heads to allow for the installation of a LSA or LS9 supercharger, or the tool could be used when
installing LSA/LS9 heads on an engine with an LS3 or L92 intake manifold. This tool works not only
for the four cylinder heads mentioned above, but for virtually any GM rectangular port cylinder head,
including LY6 truck heads.
LS3 Cylinder Head LSA Cylinder Head
Factory dowel pin hole location Factory dowel pin hole location