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DFC Engines

DFC Diesel 6.6 CHEVY/GM STREET SERIES SPEED OF AIR LONG BLOCK (STD/AUTO) 17-23 L5P $3 000.00 CORE CHARGE APPLIES - SS661723L5PSOALB

$16,461.50 $13,876.12 Save $2,585.38

SKU: D011 SS661723L5PSOALB

In Stock
In Stock
Ships by Jun 21
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Description

The DFC Diesel Street Series Speed Of Air Long Block is designed for 2017-2023 GM/Chevrolet 2500HD/3500HD 6.6L Duramax L5P engines. It features a 5-year, 160,000 km warranty and includes significant upgrades over stock components. Key features include ARP or OptiTorque head studs for improved clamping, Total Seal gapless piston rings for better compression, and an upgraded oil pump gear for long-term reliability. The engine block is professionally machined and includes new pistons, rings, bearings, and gaskets. Cylinder heads are fully rebuilt with new seats, guides, valves, and stem seals.

Fitment

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Specifications

BrandDFC Engines
Part NumberD011 SS661723L5PSOALB

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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