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**Stocking Pistons: Chevrolet**
**409 Block**

**10.5 to 1 Compression Ratio**
	Ross 409 Chevrolet pistons are ideal for street/strip applications and are suitable for nitrous systems of 250 HP or less. Pins included are .990 dia., 2.930 length, .150 wall, 149 gram weight, aircraft quality, and are retained by double spiro lox or can be press fitted in rods. Ring grooves are 5/64, 5/64, 3/16.