ATK HP411PM Chevy 489CI Mid Dress Engine 565HP




This will also add the following products to your cart:

  • $560 Core charge
SKU: HP411PM Categories: ,


Engine Specifications:
• HP: 565
• TQ: 595
• Block: Seasoned OE 4 bolt main 1pc seal Gen V 1991-1995
• Bore/Stroke: up to 4.310” x 4.250”
• Displacement: 489CI
• Crankshaft: Scat nodular iron 4.250” stroke internally balanced 1pc
• Rods: Scat 4340 forged I beam 6.385” with ARP 8740 bolts
• Pistons: Forged 10.1:1` compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 237/243 @50 .635in/.640ex 112LSA
• Timing Chain: Double roller
• Cylinder Heads: Edelbrock aluminum 110cc/290cc 2.19/1.88
• Rocker Arms: Billet aluminum 1.7 roller rockers
• Oil Pan: OE 5qt
• Oil Pump: Melling high volume
• Balancer: Professional Products internal balance 8” #80004
• Flexplate/Flywheel: Pioneer #FRA-100 internal balance 168 tooth
• Intake Manifold: Edelbrock performer RPM #7161
• Distributor: HEI (Iron gear)
• Water Pump: OE long pump

Recommended Components:
• Carburetor: Quick Fuel 780CFM vacuum secondary electric choke #HR-780
• Fuel Pump: No mechanical fuel pump provision, must run an electric pump
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm

Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N per application
• Timing: 34-36 Degrees
• Spark Plug Gap: .035”
• Firing Order: 18436572
• Octane: 91+
• Stall Converter: 2800+
• Exhaust: 2” Headers


Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.


There are no reviews yet.

Be the first to review “ATK HP411PM Chevy 489CI Mid Dress Engine 565HP”

Your email address will not be published. Required fields are marked *