BP4002CTC1New from BluePrint Engines – 400ci V8 engines with new cast iron blocks. These motors take up where GM left off in 1980 by using precision CNC-machined iron blocks as a foundation. See more details below.

Official Release/Features:

Beginning in 1970, GM began production of its 400 cubic inch engine — the largest displacement of GM’s small block “mouse” engines. Legendary for producing tremendous amounts of torque and popular with both on and off road racers, it unfortunately only saw a relatively short production run of ten years, ending in 1980.

Now, after a hiatus of 35 years, BluePrint Engines is pleased to announce the reintroduction of its own, designed from the ground up 400 c.i. small block “mighty mouse”. Developed exclusively by BluePrint Engines’ engineering team utilizing modern computer design tools and manufacturing processes, this rugged power house features a BRAND NEW precision cast, CNC machined iron block as its foundation produced entirely in the USA. Possessing far more horsepower and stronger than the original, the BluePrint 400 has been completely updated with roller lifters, one piece rear seal, and 4-bolt splayed main caps. Sold standard with aluminum heads and available in multiple versions from 460 hp to 508 hp, these all new dyno-tested engines aren’t your grandpa’s 400! These high-output engines were developed with automotive enthusiasts in mind looking for the combination of a new precision cast iron block coupled with all new components and rounded out with one of the industry’s best warranty. As with all engines in BluePrint’s lineup, each 400c.i. engine is shipped with complete individual dyno test results ensuring predictable horsepower and torque output. BluePrint Engines puts their money where their mouth is, by backing their engines with an industry leading 30 month/50,000 mile warranty.

BluePrint’s new 400 c.i. product line configurations include:

Base Engine with Cast Steel Crank and Hypereutectic Pistons:

• 460 HP / 470 ft. lbs. Torque, 10.3:1 Compression Ratio

• BluePrint 64cc Aluminum Heads, Hydraulic Roller Cam, Cast Rods

• Oil Pan, Chrome Valve Covers & Timing Cover, High Volume Oil Pump

Dressed Engine with Cast Steel Crank and Hypereutectic Pistons:

• 460 HP / 470 ft. lbs. Torque, 10.3:1 Compression Ratio

• BluePrint 64cc Aluminum Heads, Hydraulic Roller Cam, Cast Rods

• Aluminum Intake Manifold & Holley 750cfm Carburetor

• Oil Pan, Chrome Valve Covers & Timing Cover, High Volume Oil Pump

Base Engine with Forged Steel Crank and Forged Pistons:

• 508 HP / 473 ft. lbs. Torque, 10.3:1 Compression Ratio

• BluePrint 64cc Aluminum Heads, Hydraulic Roller Cam, GM Rods

• Oil Pan, Chrome Valve Covers & Timing Cover, High Volume Oil Pump

Dressed Engine with Forged Steel Crank and Forged Pistons:

• 508 HP / 473 ft. lbs. Torque, 10.3:1 Compression Ratio

• BluePrint 64cc Aluminum Heads, Hydraulic Roller Cam, GM Rods

• Aluminum Intake Manifold & Holley 750cfm Carburetor

• Oil Pan, Chrome Valve Covers & Timing Cover, High Volume Oil Pump

Base Engine with Forged Steel Crank, Forged Pistons and Forged Rods:

• 508 HP / 473 ft. lbs. Torque, 10.3:1 Compression Ratio

• BluePrint 64cc Aluminum Heads, Hydraulic Roller Cam, Forged Rods

• Oil Pan, Chrome Valve Covers & Timing Cover, High Volume Oil Pump