Chevrolet 19417356 CPP LSX 376-B15 Boost-Ready Long Block Crate Engine

Description

Six bolt iron block metallurgy reinforces the Chevrolet Performance 19417356 Crate Engine. Displacing 6.2 liters across 376 cubic inches, this LSX 376-B15 competition long block yields 473 horsepower naturally aspirated and withstands up to fifteen PSI supercharger boost. Forged internals and a heavy duty iron block furnish an elite core for extreme forced induction builds.

A genuine GM LSX cast iron Bowtie block features cross bolted six bolt iron main caps and extra deck thickness. The reciprocating group combines a forged 4340 steel 3.622 inch stroke crankshaft, forged powdered metal rods, and forged aluminum pistons inside 4.065 inch cylinder bores. The boost friendly 9.1:1 compression ratio operates on 93 octane pump gas. Sump capacity holds eight quarts, establishing 470 lbs dry weight.

Key Features of Chevrolet Performance 19417356

Buy Chevrolet Performance 19417356 crate engine units to construct high boost street or strip vehicles without fear of bottom end failure. The power adder long block incorporates heavy duty internal forgings designed to handle elevated RPM and supercharger boost loads.

• Forged 4340 steel crankshaft withstands severe torsional stress from belt blowers and turbo boost.
• Forged aluminum pistons feature thicker ring lands and lowered 9.1:1 compression for forced induction.
• LSX six bolt aluminum cylinder heads provide clamping force to stop head gasket failure under boost.
• Six bolt cross bolted iron main caps eliminate crank journal flex under elevated track RPM loads.
• Chevrolet Performance 19417356 valvetrain components feature upgraded dual valve springs to control valve bounce.
• Precision machined 4.065 inch cylinder bores unshroud intake valves for enhanced cylinder head flow.
• Extra thick block decks resist combustion cylinder pressure distortion above 1000 horsepower.

Boost Ready LSX Dyno Verification

Testing on water brake engine dynamometers validates 473 brake horsepower at 6000 RPM and 444 lb-ft torque at 4400 RPM in naturally aspirated trim. Camshaft events measure 210 degrees intake and 230 degrees exhaust duration at 0.050 inch lift, producing 0.560 inch intake and 0.555 inch exhaust lift. The engine draws 15 in-Hg vacuum at 800 RPM on 93 octane fuel, holding 50 to 65 PSI hot oil pressure.

LSX Iron Block Subframe Fitment

Standard GM LS architecture drops between subframe rails on vintage Camaro, Chevelle, and C10 chassis when paired with swap engine mount plates. The crankshaft accepts 4L80E, 6L90E, or manual transmission bellhousings using standard LS flexplates or flywheels. Low profile cylinder heads clear factory firewall insulation, while the block clears intermediate steering shafts.

Forced Induction Pre Lube Guidelines

Pressurize the engine oiling channels with a pre lube tank prior to turning the starter key to safeguard crank and cam bearings. Keep boost pressure below eight PSI during initial break in to allow piston rings to seat. This unit is not built for marine raw water setups, nitromethane fuel blends, or boost surpassing fifteen PSI without race gas.

• Drain break in motor oil and replace the spin on filter after the first 500 road miles.
• Change engine oil every 3000 miles or six months with high zinc synthetic race oil.
• Examine cylinder leak down percentages and inspect spark plug heat ranges every 5000 track miles.

LSX Boost Series Shipped Manifest

Protection includes a 2-Year / 24,000-Mile factory limited warranty guarding against defective components. The shipment crate contains the assembled LSX long block, six bolt aluminum cylinder heads, valve covers, timing cover, harmonic balancer, spark plugs, and official factory build certification paperwork.