COVID-19 UPDATE: We’re here for you and shipping fast, prioritizing health and safety first. Learn More

ATK Chevy LQ9 Gen IV 408 Boost/Nitrous Short Block 24 Tooth Flat Top SP39-G4-B Engine

Item #22704

ATK Chevy LQ9 Gen IV 408 Boost/Nitrous Short Block 24 Tooth Flat Top SP39-G4-B Engine
SP39-G4-B ATK Chevy LQ9 Gen IV 408 Boost/Nitrous Short Block 24 Tooth Flat Top
*
$5,376.25
- +
Quantity:
Quantity: close

In stock

payment-icons
OR
< Back

Details

If you are looking to turn your ride into a beast, then the ATK Chevy SP39-G4-B LQ9 Gen IV 408 Short Block is the right component. It is specifically designed for engines that are used with nitrous or other boosts. Sturdy forged construction along with ARP main studs, rod bolts and Total Seal piston ring ensure longevity and consistency.

Engine Specifications:

  • Block: GM 6.0L Iron Gen IV
  • Bore/Stroke: 4.030 x 4.000
  • Displacement: 408 C.I.D.
  • Crankshaft: Manley 4340 Forged 4.000" Stroker Internally Balanced 24 Tooth
  • Connecting Rods: Manley 4340 Forged H Beam 6.125" ARP 2000 Bolts
  • Pistons: Manley 2618 Forged -4cc Flat Top
  • Piston Rings: Total Seal CS AP with Steel top ring gapped for nitrous/boost
  • Compression Ratio: 64cc = 11.9:1 / 68cc = 11.4:1 / 72cc= 11:1 (can vary due to deck height/gasket thickness)
  • 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


More info...

Contents

ATK High Performance Chevy LS 408 Short Blocks


Specifications

Engine Information:

• Oil: 5W30
• Harmonic Balancer/Damper: Internally Balanced
• Flex Plate / Flywheel: Internally Balanced
• Head Gasket: .051"


Accessories

Recommended Components:

• Balancer: Internal balance
• Flexplate/Flywheel: Internal balance
• Head Gasket: .051" thickness or per application
• Oil: 10W40 Non synthetic for first 3000 miles
• Oil Filter: Wix or K&N per application
• Oil Pump: Melling #689-10295 with high pressure spring

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 for their application. Some modifications to the vehicle may be required using these and or other aftermarket parts.


Shipping Instructions

Shipping is free and lift gate will be provided.


Eastwood Offers Free Lifetime Technical Support


Click here for product SDS information


Attention California Residents - Proposition 65


Proposition 65 Warning WARNING - Cancer and Reproductive Harm - www.P65Warnings.ca.gov






Customer Reviews

Questions & Answers