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Ford Performance 427 CI Boss Short Block

Market Price $5,800.00 You Save 16% ($900.01)
Our Price

$4,899.99 (each)

+ $99.00 Handling Fee with FREE Shipping
  • Item 399343
  • MPN# M-6009-427F

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Ideal for Building 9.5 in. Deck Engine
  • Based on the 351 Small Block Ford
  • Displacement of 427 cubic inches
  • With 4.125 in. Bore and 4.00 in. Stroke
  • Built with All New Parts
  • Aluminum 4-Bolt Boss Main Block
  • Requires M-6051-R351 Head Gaskets – Sold Separately
  • Fits All Ford Mustang Models
Great for Making Small Powerful Custom Engines. The Ford Performance 427 CI Boss Short Block provides a great foundation for your custom engine. You can add your choice of heads, cam, intake, and oil pan. It features SCAT® forged steel crankshaft and H beam connecting rods with floating pin and ARP® bolts. It also has Mahle® forged aluminum pistons compatible with Z304D, Z304P, N351, and other inline valve Windsor cylinder heads. To complete the build, M-6051-R351 head gaskets are required (not included with the engine block).

Built for Performance. The short block is assembled with high-quality parts including components from trusted vendors like SCAT® and Mahle®. It’s built with all new parts for maximum performance and reliability. Also, the block’s small size is ideal for adding a powerful engine to a vintage muscle car, street rod, Fox Body or Late Model Mustang.

Assembled and Ready. The short block is already assembled and ready for your heads, cam, and timing chain set. Note that the pistons are designed for 20-degree valve angle heads.

Application. The Ford Performance 427 CI Boss Short Block is designed to fit all Ford Mustang models.

Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Details

What's in the Box
  • (1) Assembled Short Block
Installation Info
Will it fit my Mustang?
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17
  • Bullitt - 01, 08, 09
  • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04, 93
  • Mach 1 - 03, 04
  • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
  • Boss 302 - 12, 13
  • EcoBoost - 15, 16, 17
  • GT350 - 16, 15, 17

Customer Photos

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