Item # 22712 BRAND: ATK Engines

ATK Chevy 434CI Short Block Forged Flat Top SP48 Engine

SP48 ATK Chevy 434CI Short Block Forged Flat Top
SP48 ATK Chevy 434CI Short Block Forged Flat Top
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SP48 ATK Chevy 434CI Short Block Forged Flat Top

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ATK Chevy 434CI Short Block Forged Flat Top SP48 Engine

Product Overview:

Description

Boost the performance of your ride to street standards with this ATK SP48 Chevy 434CI Short Block Forged Flat Top. It is designed with high cubic inches to produce more power for hardcore street and race cars. Its rotating assembly is fully forged, balanced and blueprinted for high-powered performance.

Engine Specifications:

  • Block: Dart SHP 4 Bolt Main 2pc Seal D/S Dipstick
  • Bore/Stroke: 4.125 x 4.000
  • Displacement: 427 C.I.D.
  • Crankshaft: Scat 4340 Forged 4.000" Stroke Internally Balanced
  • Connecting Rods: Scat 4340 Forged H Beam 6.000" ARP 8740 Bolts
  • Pistons: Forged +4cc Flat top 2 Valve Reliefs
  • Piston Rings: Moly Rings
  • Compression Ratio: 58cc=12.2:1/64cc=11.4:1
  • Camshaft Bearings: Installed & Clocked to OEM Position
  • Freeze Plugs: Brass Installed & Sealed
  • Oil Galley Plugs: Installed & Sealed
  • Weight: 285

Every great build needs a solid foundation! For that reason, we take the hard work out of the picture by selling short blocks that are ready for you to complete yourself. Our GM Short Blocks are most commonly packaged as the engine block assembled with Pistons, Piston Rings and Crankshaft installed.

ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty.



Don't forget the engine paint!
Engine Paint

In the Box

Guides & Accessories

Reviews

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Questions & Answers

Is there only the flat too option on pistons or could I opt for higher compression?

Asked by: Hoss
You should contact ATK Performance directly to obtain the answer to your question. Contact them @ 1-866-721-2315
Answered by: vince
Date published: 2021-06-09

Looking for 2004 ls1 383 stroker short block.

Asked by: Jetman
We do not offer any LS type engines currently.
Answered by: ZachC
Date published: 2021-01-21
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ATK Chevy 434CI Short Block Forged Flat Top SP48 Engine
$5,636.00
In Stock