Engines and Components› Engines, Blocks and Components

GM Performance

ENGINE

$11,999.00

SKU: G03V 12624262

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The GM Performance LS9 long block crate assembly is a foundation for high-performance engines, designed for boost. This assembly is based on the engine from the 2009-2013 Corvette ZR1 and is rated for 12 lbs. of boost. It features a forged rotating assembly with titanium connecting rods and aluminum cylinder heads with titanium intake valves and hollow sodium-filled exhaust valves.
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ENGINE
Vehicle Symptoms
  • Engine knocking under load
  • Loss of power, especially at high RPM
  • Excessive oil consumption
  • Misfire at idle
  • Check engine light with misfire codes
Diagnostic Codes
  • P0300 – Random or multiple cylinder misfire Det
  • P0301 – Cylinder 1 misfire Det
  • P0171 – FT Malf (B1)
  • P0234 – Engine Overboost Condition
  • P0217 – Engine Coolant Overtemperature Condition
Relevant Conversations
  • LS9 crate engine for sale near me
  • LS9 long block replacement cost
  • LS9 engine swap into C5 Corvette
  • LS9 vs LS7 which is better for boost
  • LS9 engine knocking noise fix
  • P0300 code after LS9 rebuild
  • LS9 forged rotating assembly upgrade
  • LS9 crate engine installation time
  • LS9 engine build for 1000hp
  • LS9 supercharger delete kit

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGM Performance
Part NumberG03V 12624262

Videos

Chevy Performance's LSX376 - Supercharger and Turbocharger Ready!

Chevy Performance's LSX376 - Supercharger and Turbocharger Ready!
must watch before you install a lsx 454!

must watch before you install a lsx 454!

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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