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CRATE ENGINES LS SERIES
Available for purchase online at
gmperformanceparts.com
LS376/515
19171225
a race-proven camshaft helps build huge power
in this carbureted combo!
By combining traditional carbureted aspiration with the high-tech attributes
of the LS platform, we’ve developed the ultimate modern engine for your
vintage car or truck—or race car. It’s the LS376/515!
With the LS3 engine as its foundation, the LS376/515 crate engine uses
the regular-production bottom end, including an aluminum block with
six-bolt cross-bolted main caps, a Corvette oil pan and LS3 cylinder heads
with high-flow, rectangular-port intake passages. To that, we swap the
fuel injection system for a high-rise intake manifold of our own design, a
770-cfm carburetor (sold separately) and our race-tested ASA Hot Cam,
P/N 12480110.
The new combination is worth 515 horsepower at a stellar 6500 rpm and
469 lb-ft of grin-inducing torque at 5000 rpm. Compared to the regular-production
LS3 and even our LS3-based LS376/480 crate engine, the ASA Hot
Cam gives this combination much more camshaft duration to hold open
the valves longer. It’s a horsepower-building camshaft designed for the
wide-open, high-rpm world of circle track racing and it means big power
for this great crate engine—whether it’s used on the street or track.
lONG caMshafT duraTiON
hiGh lifT fOr TreMeNdOus POwer
515 hP / 469 lB-fT TOrque
INSTALLATION NOTES
• 14-inch automatic transmission flexplate included
• Assembly does not include any electronics
• Use LSX ignition controller P/N 19171130
(page 288)
• Includes Corvette wet sump oil pan
• Intended for pre-1976 street vehicles or any
off-road vehicle
• Not intended for marine applications
• 770-cfm carb P/N 19170093 recommended for
daily street use
• Non-Corvette applications require flexplate
P/N 12602448
CRATE ENGINES LS SERIES
See page 300 for information on our reference guide P/N 88959384 for
installing an LS engine in an older car.
ls376/515 dyno chart
Possible aPPlications*
ls376/515 tech sPecs
Put an ls engine where that old
small-Block used to be
replace the Big-Block with the hot
new engine from GM
Make that show car perform as good
as it looks
*Applications have not been validated.
They are merely suggestions of how you
might enjoy your GM Performance Parts
crate engine. Some applications may affect
engine warranty. See page 352 for specific
warranty information. Some applications
may not be emission-legal; check state and
local ordinances.
Part Number: 19171225
Engine Type: LS Series Gen IV Small-Block V-8
Displacement (cu in):
376 cu in (6.2L)
Bore x Stroke (in):
4.06 x 3.62 (103.25 x 92mm)
Block (P/N 12584727):
Cast-aluminum with 6-bolt,
cross-bolted main caps
Crankshaft (P/N 12597569):
Nodular iron
Connecting Rods (P/N 12617570): Powdered metal
Pistons (P/N 19168089):
Hypereutectic aluminum
Camshaft Type (P/N 12480110): Hydraulic roller
Valve Lift (in):
.525" intake / .525" exhaust
Camshaft Duration (@.050 in): 226° intake / 236° exhaust
Cylinder Heads (P/N 12615879): Aluminum L92 style port;
as cast with 68cc chambers
Valve Size (in):
2.165 int / 1.59 exhaust
Compression Ratio: 10.7:1
Rocker Arms (P/N 12569167 int): Investment-cast, roller trunnion
Rocker Arms (P/N 10214664 exh): Investment-cast, roller trunnion
Rocker Arm Ratio: 1.7:1
Recommended Fuel:
92 octane
Maximum Recommended rpm: 6600
Reluctor Wheel:
58X
Balanced:
Internal
Available for purchase online at
gmperformanceparts.com
GM Performance Parts Crate Engines include a 24-month
or 50,000-mile/80,000-kilometer limited warranty.
GM Performance Parts does not utilize any used
or remanufactured parts in this crate engine.
For a complete list of parts to complement and finish this engine, turn to page 80.
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