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- Description
- Warranty
When your LS build demands serious displacement, you need a block that’s engineered to go the distance—and this LS-compatible foundation is built to stretch all the way to an impressive 519 cubic inches. With reinforced architecture, thick cylinder walls, and precision-machined surfaces, it delivers the rigidity and reliability needed for high-horsepower, high-rpm combinations. Whether you’re assembling a torque-rich street monster, a boosted track bruiser, or a no-compromise stroker setup, this block gives you the headroom and confidence to push your LS platform far beyond stock limits. Big inches, big power, and rock-solid dependability start right here.
- Cylinder Bore (Rough): 3.995" to 3.997"
- Cylinder Bore (Max): 4.185"
- Cam Bearings: Dura-Bond CH-25
- Cam Bearing Bore ID: #1 & 5: 2.3482±.0005", #2 & 4: 2.3285±.0005", # 3: 2.3088±.0005" w/ stock available to bore up to 2.362" (60mm)
- Camshaft Position: Stock OEM position - 4.885" to Crank
- Cam Drive / Timing Set: Accepts OEM style
- Cam Retaining Plate: BluePrint Engines P/N:18111370
- Cubic Inch (Max): 519 in3
- Cylinder Wall Thickness: .210" @ 4.185" Bore
- Cylinder Skirt Length: 6.210"
- Deck Height: 9.705" +.005/-.000"
- Deck Thickness: .600"
- Freeze / Core Plugs: 1 5/8" dia, BluePrint Engines p/n: 10110016 (Qty 8)
- Head Bolt / Stud: 6 Per Cylinder
- Head Bolt / Stud Threads: M11 x 2.0 2.36" Deep (+M8 uppers)
- Lifter Bores: .8437 ±.0005"
- Lifter Retainer (If not using tie car lifters): GM LSX Style
- Main Bearing Bore (Line Honed): 2.7509 / 2.7514"
- Main Bearing Caps: Billet Steel, OEM style, 6 Bolts Per Cap
- Main Cap Bolts: Inner: M10 x 102mm, Outer: M10 x 84mm (stud), Skirt: M8 x 24mm
- Main Fastener Tensile Strength: 180,000 to 210,000 PSI
- P1 Main Stud Kit P/N: TBD
- ARP Main Stud Kit P/N: TBD
- Material (Block): EN-GJL-250 Iron
- Oil System: Priority Main Oiling System w/ Center Crossover
- Oil Pump: OEM
- Oil Filter: OEM (in Oil Pan)
- Oil Pan: OEM
- Oil Gallery Plug / Barbell / Dogbone (rear): OEM
- Piston Oilers / Squirters: No
- Rear Main Seal: Accepts OEM Style Rear Cover
- Starter: OEM, Passenger Side Only
- Stroke (Max): 4.250"
- Timing Cover: OEM
- Valley Cover: OEM
- AFM/DOD Compatible: No
- Approx. Weight with Main Caps: 230-250lbs
Better Than the Rest.
The satisfaction of our customers is our highest priority at BluePrint Engines. Every engine we build is assembled with premium components, balanced to within two grams, and dyno-tested to verify real horsepower and torque before it leaves our facility.
All BluePrint products include warranty protection designed specifically for how they're used. Our complete crate engines carry our industry-leading 30-month / 50,000-mile warranty, offering the confidence and peace of mind serious builders expect. Other BluePrint products—including bare blocks, marine engines, transmissions, race applications, and cylinder heads—feature warranty coverage tailored to their intended use and operating conditions.
For full terms and specific coverage by product category, download our warranty guide below. It contains complete details, limitations, and instructions for warranty registration and claims.
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Register NowEVERY BLUEPRINT ENGINE ACES THE DYNO TEST
We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer in our in-house dyno testing rooms to get our rotating assemblies within two grams, ensuring silky smooth power over the entire RPM range. That’s precisely why our engines sound and run better than our competitors.
All specs, zero speculation: A comprehensive, dyno-generated printout showing your critical engine specs will accompany your delivered engine — every time. No more guessing or wondering what your installed engine’s real-world peak horsepower and torque ratings actually are. Any doubters in the crowd? Simply flash ‘em your exact engine’s dyno results.