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ATK ENGINES

CHEVY LQ4 408CI BASE ENGINE

$10,569.45

SKU: A040 408BOOSTLBR

Special Order
Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

Designed for use with a Turbo or Supercharger up to 15psi. Affordable and strong enough for significant boost. Featuring 550 HP and 535 TQ, this engine has a GM 6.0L Iron LQ4 block with ARP main studs, Manley 4.000″ Stroke Internally Balanced 24 tooth Reluctor wheel, Manley 4340 Forged 6.125” H Beam Rods with ARP 2000 Bolts, Forged Pistons for a 10.2:1 Compression Ratio, and ATK LS3 aluminum 68cc heads.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandATK ENGINES
Part NumberA040 408BOOSTLBR

Videos

Build the Ultimate LQ4/LQ9: Boost-Ready LS Power Guide!

Build the Ultimate LQ4/LQ9: Boost-Ready LS Power Guide!
ATK #LS01C LQ4 408CI Stroker 620+HP!

ATK #LS01C LQ4 408CI Stroker 620+HP!
ATK's new LS 408CI Stroker!.AVI

ATK's new LS 408CI Stroker!.AVI

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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