Item # 22641 BRAND: ATK Engines

ATK Chevy 350CI Engine 375HP Complete EFI HP89C-EFI

ATK HP89C-EFI Chevy 350CI 375HP Complete Engine Long Block Price Includes $770 Core Charge
ATK HP89C-EFI Chevy 350CI 375HP Complete Engine Long Block Price Includes $770 Core Charge
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ATK HP89C-EFI Chevy 350CI 375HP Complete Engine Long Block Price Includes $770 Core Charge

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ATK Chevy 350CI Engine 375HP Complete EFI HP89C-EFI

Product Overview:

Description

When you are looking for hassle-free driving experience, the ATK HP89C-EFI Chevy 350CI Engine 390HP Complete is the one to choose. Troublesome cold starts or harsh driving conditions? The FiTech Self-Learning EFI system has got your back, as it regulates engine performance and fuel efficiency through electronic means. The engine comes complete from the throttle body to the oil pan.

Engine Specifications:

  • Horsepower: 390
  • Torque: 420 lbs./ft.
  • Block: OE roller block 4 bolt main 1pc seal 1996-2000
  • Bore/Stroke: 4.040 x 3.480
  • Displacement: 350 C.I.D.
  • Crankshaft:OE Reground external balance rear of the crank/internal balance front of the crank
  • Connecting Rods: OE Powder Metal 5.700" Stock Bolts
  • Pistons: Hypereutectic 10:1 Compression
  • Piston Rings: Moly Rings
  • Compression Ratio: 10.1:1 Compression
  • Camshaft: Hydraulic Roller
  • Camshaft Specifications: 220/224 @050 .528in/.536ex 112LSA
  • Camshaft Bearings: Installed & Clocked to OEM Position
  • Cylinder Heads: ATK High Performance aluminum with 2.020 in. /1.600 ex. valves
  • Freeze Plugs: Brass Installed & Sealed
  • Rocker Arms: Billet Roller Rockers 1.6 Ratio
  • Oil Galley Plugs: Installed & Sealed
  • Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
  • Weight: 430

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

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Questions & Answers

Can I put this in a 1983 k5 blazer and will I have smog issues in ca

Asked by: Martyz
Hi there, For any fitment and installation questions regarding the ATK engines, we recommend reaching out to them directly to confirm. Below is ATKs direct info. https://www.high-performance-engines.com/contact-us-s/1786.htm
Answered by: ZachC
Date published: 2022-05-12

What if any will I need to do to put this engine in my 1990 Chevrolet Silverado 1500...??

Asked by: hw684evr
Hi there, For any fitment and installation questions regarding the ATK engines, we recommend reaching out to them directly to confirm. Below is ATKs direct info. https://www.high-performance-engines.com/contact-us-s/1786.htm
Answered by: ZachC
Date published: 2023-08-24

What will I need to put this in a 1979 Nova with a 700R transmission ?

Asked by: Ducky
We would have to advise you to speak directly with the manufacturer which is ATK High Performance. They can be reached by calling 866-721-2315.
Answered by: Kelly H
Date published: 2021-05-30

Will this fit my 87 vette

Asked by: Charlie2
Yes, the Eastwood ATK Chevy 350ci Engine(22641) will fit the engine bay of your 1987 Corvette. Some modification will be necessary to the wiring, exhaust and fuel system.
Answered by: vince
Date published: 2024-01-19

What fuel modifications needs to be done

Asked by: Rick
HP89C what fuel modifications do I need to do to put it in my 1989 Pontiac firebird formula 5 speed
Answered by: Rick89
Date published: 2019-12-28

Hello, I have a stock 1997 GMC Yukon with the 5.7L Vortec V8 and the central sequential fuel injection system. 1. Will this motor bolt right up to that 1/2 ton frame? 2. Does this EFI system work with the stock ECM, or does it need an aftermarket?

Asked by: Rocky
This engine will fit but it is not designed for emissions controlled vehicles like a 1997 GMC Yukon. The Fitech EFI system installed on this motor is self contained and has its own ECM
Answered by: Kelly H
Date published: 2020-10-03
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ATK Chevy 350CI Engine 375HP Complete EFI HP89C-EFI
$5,865.00
In Stock