Chevrolet 476ci Specs: 4.528 x 4.921 in

Chevrolet 476ci specs: 4.528 x 4.921 in (115 x 125 mm) bore and stroke. Displacement, compression and factory ratings, plus rod ratio.

At a glance

Displacement	476 ci
Cylinders	6
Bore	4.528"
Stroke	4.921"
Years	2003–2009

This engine

Engine	Displacement	Bore × Stroke	CR	HP
Duramax 7800	476 ci	4.5276" × 4.9213"	—	—

Factory cars with a Chevrolet 476ci

• Chevrolet Kodiak / TopKick: 2003; 2004; 2005; 2006; 2007; 2008; 2009

What varies across the family

This family is represented by a single engine in the database: 476 ci, 6 cylinders, a 4.5276" × 4.9213" bore and stroke.

All are undersquare — stroke larger than bore, favouring torque low in the range.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

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