The BluePrint Engines GM LS-Compatible 427 C.I. Pro Series Engine is a supercharged powerhouse, producing 800 horsepower and 780 ft-lbs of torque. Based on the highly popular LS platform—ideal for street cars and restomods—this deluxe dressed package is built for enthusiasts who demand both performance and polish. It features BluePrint LS3 aluminum cylinder heads, a 11:1 compression ratio, and a high-performance hydraulic roller cam (.624/.624 lift, 239/255 duration @ .050, 114° LSA). Forged pistons, a forged crank with a 4.125" stroke, and 6.125" forged rods ensure strength under boost from the Magnuson TVS2650 supercharger. The black front drive pulley kit includes a LT1-style 150-amp alternator, LT1-style water pump, Type II power steering pump with baffled reservoir, and compact A/C compressor. A Holley Terminator X Max ECU and harness (550-931) rounds out this plug-and-play EFI system, delivering precision control and street-ready performance right out of the crate.
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The satisfaction of our customers is our highest priority at BluePrint Engines. We use quality components to balance your engine's rotating assembly within two grams of spec. We dyno test your crate engine and certify that it's ready to deliver horsepower and torque.
We give your BluePrint engine the industry's best-in-class warranty for 30-months / 50,000 miles — with the extra confidence only BluePrint can provide. Our warranty applies to individual or professional installations and is fully transferable.
For a detailed overview of our warranty, 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)!
