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MSRP

$6,893

Part No.

19171049

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For Off-Road &

For Off-Road &
STREET

6 Select
Available Mods

Power

Power
450
hp @ 5900 rpm

An affordable foundation for forced induction

Boost on a budget! That’s what you get with the LSX376-B8. Chevrolet Performance takes the economical LSX Bowtie standard-deck block, adds blower-friendly 9.0:1 forged pistons, and combines them with the LS3’s high-flow, rectangular-port heads to create an affordable foundation for supercharged and turbocharged combinations.

The LSX376-B8 is designed for lower-boost applications, up to about 8 pounds. That’s suitable for most supercharger and turbo kits that are designed to be used with production-based applications.

We deliver the LSX376-B8 without an intake manifold and other accessories to keep the price lower and enable the installer to tailor the induction system to suit the blower or turbo system. Put this great engine in a vehicle originally equipped with an LS engine to give it a stronger bottom end for forced induction, or drop it into a street rod or classic muscle car body for a modern update.

*Horsepower and torque ratings were derived by GM Engineering using a normally aspirated LSX376 with LS3 EFI. Your power numbers may vary, based on induction system and componentry.

LSX376-B8 DYNO

Click on the slider to see the torque and power ratings change with rpm.*

*Approximate values shown.

LSX376-B8 TECH SPECS

Part Number:
19171049
 
 
Engine Type:
LSX-Series Gen IV Small-Block V-8
Displacement (cu. in.):
376 (6.2L)
Bore x Stroke (in.):
4.065 x 3.622 (103.25 x 92 mm)
Block (P/N 19244055):
LSX cast-iron with six-bolt, cross-bolted main caps
Crankshaft (P/N 12597569):
Nodular iron
Connecting Rods (P/N 12607475):
Powdered metal
Pistons (P/N 19244016):
Forged aluminum
Camshaft Type (P/N 12603844):
Hydraulic roller
Valve Lift (in.):
0.551 intake / 0.522 exhaust
Camshaft Duration (@0.050 in.):
204° intake / 211° exhaust
Cylinder Heads (P/N 12615879):
LS3 rectangular port; with “as cast” 68-cc chambers
 
 
Valve Size (in.):
2.160 intake / 1.590 exhaust
Compression ratio:
9:1
Rocker Arms (P/N 12569167 int):
Investment-cast, roll trunnion
Rocker Arms (P/N 10214664 exh):
Investment-cast, roll trunnion
Rocker Arm Ratio:
1.7:1
Recommended Fuel:
87 octane
Maximum Recommended rpm:
6600
Reluctor Wheel:
58X
Balanced:
Internal

OWNER RESOURCES

Already own one, but lost some of the paperwork? We’ve got you covered with downloads and links for some of the more important documents below. You’ll find everything from the vital data about your engine’s capabilities to how to install it into your build, even all of the warranty information should you need to make a claim. And don’t forget, the best way we can make sure to get you the latest information on your specific part is to tell us which one you have by registering your engine. No matter what stage of your build you’re in — from shopping for the right part to that part having turned in a few miles — we have the information you need.

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  • INSTALLATION NOTES

    • Assembly does not include any electronics
    • Intended for pre-1976 street vehicles or any off-road vehicle
    • Not intended for marine applications
    • Requires LSX Ignition Controller (P/N 19171130) for carbureted applications
    • Standard LS six-bolt crank flange
    • Assembly shipped without intake manifold or oil pan (dust shield installed for shipment)
    • Recommended max boost — 8 PSI

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FINISH OFF YOUR CRATE ENGINE WITH THESE SELECT PARTS

Download a catalog for a full listing of components and related parts.

SuperMatic 4L70-E Four-Speed Automatic
Transmission • P/N 19244043

LSX-LS3 Single-Plane Standard Deck 4-bbl Manifold
• P/N 19244035

Transmission Controller • P/N 19212657

LSX-LS3 Dual-Plane Standard Deck 4-bbl Manifold
• P/N 19244037

Muscle Car Oil Pan Kit • P/N 19212593

LS3 Intake Manifold Assembly • P/N 12638197

  • 1 Performance MSRP The Manufacturer's Suggested Retail Price excludes tax, shipping and installation.
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Destination Freight Charges

To allow you to do an accurate price comparison with prices featured on other Internet sites, GM provides Internet pricing both with and without the Destination Freight Charge (see prices including Destination Freight Charge below). To get full pricing details, go to our Build Your Own section.