BluePrint Motorsports Pro Series Chevy LS 427 C.I.D. Power Adder Long Block Crate Engines BPMS4271LS

Name: BluePrint Motorsports Pro Series Chevy LS 427 C.I.D. Power Adder Long Block Crate Engines
Brand: BluePrint Motorsports
SKU: MLL-BPMS4271LS
Price: 13999.00 USD
Availability: OutOfStock
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Part Number: MLL-BPMS4271LS

$13,999.00

BluePrint Motorsports Pro Series Chevy LS 427 C.I.D. Power Adder Long Block Crate Engines

Crate Engine, Pro Series Chevy LS 427 C.I.D., Power Adder, 2618 Forged Pistons, Forged Crankshaft, Aluminum Heads, 9.5:1 Compression, Each
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BluePrint Motorsports Pro Series Chevy LS 427 C.I.D. Power Adder Long Block Crate Engines BPMS4271LS

MLL-BPMS4271LS

Not Yet Reviewed

Part Number: MLL-BPMS4271LS

Estimated Ship Date: Dec 17, 2026

$13,999.00

Overview

Applications

Q&A

Instructions & Calculators

Estimated Ship Date: Dec 17, 2026 Would you rather pick it up?

Overview

Brand:

BluePrint Motorsports

Manufacturer's Part Number:

BPMS4271LS

Part Type:

Crate Engines

Product Line:

BluePrint Motorsports Pro Series Chevy LS 427 C.I.D. Power Adder Long Block Crate Engines

Summit Racing Part Number:

MLL-BPMS4271LS

UPC:

00887753990983

Crate Engine Family:

Chevy LS

Actual Engine Displacement:

7.0L/427

Crate Engine Cylinder Head Material:

Aluminum

Engine Block Material:

Cast iron

Advertised Compression Ratio:

9.5:1

Assembled:

Yes

Engine Balance:

Internal

Cam Style:

Hydraulic roller, OE roller

Rear Main Seal Style:

1-piece

Intake Manifold Included:

Cylinder Heads Included:

Yes

Carburetor Included:

Throttle Body Included:

Distributor Included:

Oil Pan Included:

Yes

Valve Covers Included:

Yes

Timing Cover Included:

Yes

Water Pump Included:

Harmonic Balancer Included:

Yes

Flexplate Included:

Flywheel Included:

Air Cleaner Included:

Spark Plugs Included:

Spark Plug Wires Included:

Computer Included:

Wiring Harness Included:

Supercharger Included:

Remanufactured:

Quantity:

Sold individually.

BluePrint Motorsports Pro Series Chevy LS 427 C.I.D. Power Adder Long Block Crate Engines

BluePrint Motorsports Pro Series Chevy LS 427 c.i.d. power adders are the ultimate long blocks, built for maximum boosted horsepower on the drag strip, drifting circuits, off-road trails, and autocross courses. Featuring BluePrint's high-strength LSX-style cast iron block, they will provide power and reliability. Topping it off these engines with LS3 aluminum heads, paired with a BluePrint hydraulic roller cam for optimized airflow and performance across the powerband. Inside, a forged 8cwt crankshaft and forged H-beam rods provide rock-solid strength, while Mahle 2618 custom forged pistons ensure unmatched durability under pressure.

Block:

* BluePrint Engines high-strength cast iron LSX-style block
* Compression ratio: 9.5:1
* Increased deck thickness and strength webbing
* Utilizes OEM LS3 front and rear covers
* Improved water jacket design
* Extended cylinder skirt
* One-piece rear main seal
* Priority main oiling
* 6-bolt main
* 4.0695 in. bore

Rotating assembly:

* Forged crankshaft
* 4.125 in. stroke
* Forged 6.125 in. connecting rods
* Mahle custom 2618 forged pistons
* Internally balanced front and rear

Cylinder heads:

* BluePrint aluminum cylinder heads
* 70cc chamber
* 2.165 in. intake/1.600 in. exhaust valves
* 259cc intake/102cc exhaust runners

Camshaft specs:

* Hydraulic roller
* .641 intake/.641 exhaust lift
* 236 intake/256 exhaust duration at .050 in.
* 115.5-degree LSA

Also includes:

* Harmonic balancer
* LS swap oil pan
* Timing cover
* Valve covers

Notes:

* Engine does not come with a fuel injection ECU and wiring harness.
* BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty applications. Because of the high-stress nature of their use, if this engine is used in a street application, 30 month, 50,000-mile warranty applies, if used in sanctioned racing no warranty, expressed, or implied.