BluePrint Motorsports GM LS Compatible 427 c.i. Pro-Series Engine - Power Adder - Short Block

**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.

Overview:

The new BPE LS Iron Block 427 Stroker Short Block is built as a strong foundation for high-horsepower power adder applications. Featuring a durable iron LS block and a fully forged rotating assembly, this short block is designed to handle supercharged, turbocharged, or nitrous combinations with confidence. It includes forged pistons with a 4.070 bore, forged H-beam rods, and an 8-weight forged crankshaft with a 58x reluctor ring, all internally balanced for smooth and reliable performance. Finished with a 6-bolt crank flange for added strength, this 427 LS short block is an excellent choice for serious street or race builds looking for durability and big power capability.

Description: 

• Compression Ratio: 9.5:1 with 70cc Heads
  
• BluePrint Engines Forged Crankshaft
• Mahle 2618 Custom Forged Pistons

Block:

• BluePrint Engines High Strength Cast Iron (LSX Style) Block 
• Increased Deck Thickness and Strength Webbing
  
• Utilizes OEM LS3 Front and Rear Covers
• Improved Water Jacket Design
• Extended Cylinder Skirt
• 1-piece Rear Main Seal
  
• Priority Main Oiling
• 4.0695" Bore
  
• 6-bolt studded mains
  
• Billet Main Caps

Rotating Assembly:

• Forged 8cwt Crankshaft
• 4.125" Stroke
• Forged H-Beam 6.125" Connecting Rods
• Mahle Custom 2618 Forged Pistons - Dish - 22cc
• Internally Balanced Front and Rear

Notes:

• BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty applications. Because of the high-stress nature of their use, these engines are sold without any warranty, expressed, or implied.