Butler Performance Custom Short Block Kit, 428 Block, 4.250" Str (Unassembled)

SKU: BP-SB-Kit-428-4250

Customized Butler Performance Short Block Kit
Option to send us your block
Choose Bore Size, Stroke, Crank, & Rod
Choose 4.250" Stroke
Create a custom package tailored to you
All short blocks undergo the "Butler Process"

Availability: Now ships in 4-6 Weeks!!! (slightly longer for full custom pistons). Ships to business address. Residential or liftgate are available for additional charges

Pricing: $5,999.00

Customize Your Item

Choose Your Assembly

- Choose Your Assembly -

* required

Enter desired compression ratio or specific Dish cc requested. Recommended CR for pump gas is +/- 9.5:1 for cast iron heads and +/- 10.5:1 for Aluminum heads.

Option for Billet Center and Front Main Caps with Line Hone and necessary machining for the upgrades

Choose Main Cap Upgrade

- Choose Main Cap Upgrade -

* required

Choose Crank Option

- Choose Crank Option -

* required

Qty:

Description

434-494 CI short block kit
Complete Internally Balanced longrod rotating assembly &
high-performance prepped block

4.250" stroke cast or forged crank (4-Bolt Billet Mains Caps recommended for 4.5" stroke)
Internally Balanced
Ross Racing Pistons (Bore 4.155 - 4.181 440 grams)-Flat Top (Dish or Dome/additional charge)
H-Beam Rods
File fit rings
Performance Rod bearings
Performance Main bearings
428 Performance 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
- ready to assemble
Can be upgraded with various options

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

Compression Calculator

428 Block		Head cc w/-8cc Flat top
Stroke	Bore	72cc	87cc	96cc
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.

Details

SKU: BP-SB-Kit-428-4250
Stock #: BP-SB-Kit-428-4250
Brand: Butler Performance
Availability Remarks: Now ships in 4-6 Weeks!!! (slightly longer for full custom pistons). Ships to business address. Residential or liftgate are available for additional charges
Condition: New