Butler Performance Budget Short Block, 389 Block, 447-454 ci, 4.250" Stroke (Assembled)

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SKU: BP-SB-389-4250

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(866)762-7527

Availability: Contact us for lead time

Description

406-412 CI short block (Assembled)
Complete Internally Balanced rotating assembly prepped block

4.250" stroke Cast or Forged crank
Internally Balanced
Choose Flat Top, Dish, or Dome Pistons- Add head casting or head cc info at checkout and we will confirm compression ratio
Total Seal Rings- File Fit
6.88" H-Beam Rods
Performance Rod Bearings
Performance Main bearings
Includes Viton Rear Main Seal
389 prepped block
- cleaned
- magnafluxed
- sonic tested
- completely deburred
- bored and honed with torque plate
- line honed with ARP main studs
- deck squared
- cam bearings and brass freeze plugs installed
- Assembled by a Butler Engine Specialist

Included reusable engine cradle

Images for display purposes only and could show optional parts. Contact us for a custom quote for your application and specifications

400 Block		Head cc w/-8cc Flat top
Stroke	Bore	72cc	87cc	96cc
3.750"	4.155"	10.38	9.02	8.38
	4.181"	10.48	9.11	8.46
4.000"	4.155"	11	9.55	8.87
	4.181"	11.12	9.65	8.96
4.210"	4.155"	11.53	10	9.28
	4.181"	11.65	10.1	9.38
4.250"	4.155"	11.63	10.09	9.36
	4.181"	11.75	10.19	9.46
4.500"	4.155"	12.25	10.62	9.85
	4.181"	12.38	10.73	9.96
Click here to use our compression calculator to calculate compression with thicker head gaskets, decked block, or other variables.

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