**BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty race applications. If this engine is used in a street application our normal 30 month, 50,000-mile warranty applies, if used in sanctioned racing no warranty, expressed, or implied.
BluePrint Motorsports introduces the ultimate 427ci LS Chevy-compatible long block, purpose-built for maximum boosted horsepower. Whether you’re chasing wins on the drag strip, sliding through drift circuits, tackling off-road trails, or carving up autocross courses, this engine delivers the perfect blend of power and reliability. At its foundation is a high-strength LSX-style cast-iron block, designed to handle extreme boost from nitrous, superchargers, or turbos. Topping it off are BluePrint Engines 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:
BETTER THAN THE REST.
At BluePrint Engines, customer satisfaction is our highest priority. Every engine is built using high-quality components, with each rotating assembly balanced to within two grams of specification. Before shipment, every crate engine is dyno tested and certified to ensure it is ready to deliver the horsepower and torque you expect.
To stand behind that level of quality, BluePrint Engines offers industry-leading warranty coverage, providing confidence and peace of mind whether the engine is installed by an individual or a professional installer. Our standard warranty is fully transferable, adding long-term value and reassurance for our customers.
Warranty Coverage Details:
*Applies to eligible engine part numbers beginning with “B” or “P.” Warranty coverage is subject to terms and conditions. Proper installation and maintenance are required.
Please refer to full warranty documentation for complete details click here.
We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer to get our rotating assemblies within two grams, ensuring silky smooth power over the entire RPM range. That's precisely why our engines sound and run better than our competitors.
A comprehensive, dyno-generated printout showing these critical specs will accompany your delivered engine. No more guessing or wondering what your installed engine's real-world peak horsepower and torque ratings actually are. Any doubters in the crowd? Simply flash 'em your dyno results!
This engine will be dyno tested before it ships to you at no additional charge (others charge $500)!
