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Chrysler/Dodge/DeSoto Hemi ID Numbers

Chrysler Extended Block

Code	Year of Manufacture	CID	HP/RPM	Bore/Stroke	Compression Ratio	Carb	Model
C51-8	1951	331	180/4000	3.81 x 3.63	7.5:1	2 bbl	Saratoga, NY
C52-8	1952	331	180/4000	3.81 x 3.63	7.5:1	2 bbl	Saratoga, NY
C53-8	1953	331	180/4000	3.81 x 3.63	7.5:1	2 bbl	Saratoga, NY

Chrysler Regular Block - 697 lbs.

Code	Year of Manufacture	CID	HP/RPM	Bore/Stroke	Compression Ratio	Carb	Model
C54-8	1954	331	235/4400	3.81 x 3.63	7.5:1	4 bbl	New Yorker
NE55	1955	331	250/4600	3.81 x 3.63	8.5:1	4 bbl	NY Deluxe
3NE55	1955	331	300/5200	3.81 x 3.63	8.5:1	(2) 4 bbl	300
NE56	1956	354	280/4600	3.94 x 3.63	9:1	4 bbl	New Yorker
3NE56	1956	354	340/5200	3.94 x 3.63	9:1	(2) 4 bbl	300B
3NE56	1956	354	355/5200	3.94 x 3.63	10:1	(2) 4 bbl	300B Option

Chrysler Rasied Block - 737 lbs. >

Code	Year of Manufacture	CID	HP/RPM	Bore/Stroke	Compression Ratio	Carb	Model
NE57	1957	392	325/4600	4.0 x 3.9	9.25:1	4 bbl	New Yorker
3NE57	1957	392	375/5200	4.0 x 3.9	10:1	(2) 4 bbl	300C
58N	1958	392	345/4600	4.0 x 3.9	10:1	4 bbl	New Yorker
58N3	1958	392	380/5200	4.0 x 3.9	10:1	(2) 4 bbl	300D
58N3	1958	392	380/5200	4.0 x 3.9	10:1	EFI	300D Option

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Dodge "Low" Block - 577 lbs.

Code	Year of Manufacture	CID	HP/RPM	Bore/Stroke	Compression Ratio	Carb	Model
D44 D50 -1,2,3	1953 1954 1954	241	140/4400 140/4400 150/4400	3.81 x 3.63	7.0:1 7.1:1 7.5:1	2 bbl	Coronet Royal "Sport"
D55-1 D55-2 D55-3	1955	270	180/4400 180/4400 193/4400	3.81 x 3.63	7.6:1	2 bbl 2 bbl 4 bbl	Coronet & Royal Royal Custom

Dodge Raised Block - 611 lbs.

Code	Year of Manufacture	CID	HP/RPM	Bore/Stroke	Compression Ratio	Carb	Model
D500 -1	1956	315	260/4800 295/5000	3.625 x 3.8	9.25:1	4 bbl (2) 4 bbl	Optional
KD500 -1	1957	325	285/4800 310/5000	3.6875 x 3.8	9.25:1	4 bbl (2) 4 bbl	Optional
D501 -1	1957	354	340/5200 355/5200	3.9375 x 3.625	10:1	(2) 4 bbl	Export Race Only

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DeSoto "Low" Block - 631 lbs.

Code	Year of Manufacture	CID	HP/RPM	Bore/Stroke	Compression Ratio	Carb	Model
S17 S16 S19	1952 1953 1954	276	160/4400 160/4400 170/4400	3.625 x 3.344	7.0:1 7.1:1 7.5:1	2 bbl	Firedome
S21 S22	1955	291	200/4400 185/4400	3.72 x 3.344	7.5:1	4 bbl 2 bbl	Firedome Fireflite

DeSoto Raised Block - 669 lbs.

Code	Year of Manufacture	CID	HP/RPM	Bore/Stroke	Compression Ratio	Carb	Model
S23 S24	1956	330	230/4400 255/4400	3.72 x 3.8	8.5:1	2 bbl 4 bbl	Firedome Fireflite
S24A S25 S26	1956 1957 1957	341	320/5200 270/4600 295/4600	3.7812 x 3.8	9.5:1 9.25:1 9.25:1	(2) 4 bbl 2 bbl 4 bbl	Adventurer Firedome Fireflite
S26A	1957	345	345/5200	3.8 x 3.8	9.5:1	(2) 4 bbl	Adventurer

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