Free Shipping On Orders Over $75. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $10,000 in Store Credit! Enter Now >

Ford Performance 427 Cubic Inch Boss Short Block

Item 399343
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $6,218.38 You Save 12% ($715.39)
Our Price

$5,502.99 (each)

+ $99.00 Handling Fee with FREE Shipping

Out of Stock

Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Choose options to add to cart.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    or use

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 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.


      Ford Performance M-6009-427F

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Assembled Short Block

      Tech Specs


      Customer Reviews (1)

        Reviews of Ford Performance Engine products have an average rating of 4.8 out of 5

          Questions & Answers

          10 More Questions

              Related Mustang Categories