19417356 Chevrolet Performance LSX376 B-15 Replaces 19332320, 19355575
473 HP LSX376 B-15, Forged Internals Support More Boost!
LSX 376-B15,Featuring A Durable, All Forged Rotating Assembly To Handle Up To 15 Pounds Of Boost.
New! forged internals and 6-bolt LSX heads that support more boost!
For builders who want to stretch the performance of a turbocharged or supercharged combination, we’ve got just the foundation you need:
Chevrolet Performance’s new LSX376-B15, featuring a durable, allforged rotating assembly to handle up to 15 pounds of boost.
Chevrolet Performance’s engineers started with the tough LS steel Bowtie standard-deck block, added a forged steel crankshaft, forged rods and forged pistons, then topped off the short-block assembly with high-flow, rectangular-port LSX- LS3 6-bolt aluminum heads for supercharged and turbocharged combinations.
We deliver the LSX376-B15 without an intake manifold and other accessories, allowing you to tailor the induction system and other features to suit the forced-induction setup of your choice. It’s perfect as an economical replacement for a late-model performer or a great choice to build a high-boost power plant for a Pro Touring classic.
*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.
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
• LSX 8-bolt crank flange
• Assembly shipped without intake manifold or oil pan (dust shield installed for shipment)
• Recommended max boost - 15 PSI
LSX376-B15 TECH SPECS
Part Number: 19355575
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 19260095): LSX cast-iron with six-bolt, cross-bolted main caps
Crankshaft (P/N 12603616): Forged steel
Connecting Rods (P/N 12607475): Forged powdered metal
Pistons (P/N 19259381): Forged aluminum
Camshaft Type (P/N 12638426): Hydraulic roller
Valve Lift (in.): 0.560 intake / 0.555 exhaust
Camshaft Duration (@0.050 in.): 210° intake / 230° exhaust
Cylinder Heads (P/N 19201805): LSX-LS3 rectangular port; with “as cast” 68-cc chambers/six-bolt attachment
Valve Size (in.): 2.160 intake / 1.550 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
Click here to download Product Information Sheet
Chevrolet Performance announces a temporary change to the LSX376-B15 (19299306) crate engine valve covers. LSX376-B15 engines will be produced and delivered with gray covers with black lettering.
LSX376 Valve Cover (gray w/black LSX 376 lettering):
p/n 19171270
The foundation with this engine is the same sturdy LSX-series Gen IV Small block V8 - cast-iron block with six-bolt (cross bolted main caps), but a valve cover change has been made. Chevrolet Performance customers will find the LSX376-B15 featuring gray valve covers with black lettering.
NOTE: Fit, form and function do not come into play with this cosmetic change.
Still have questions or want more information, Please call us at 847-276-8110