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Can someone help me tell the difference of the two motors?

I know there is the 96-98 B20 model and there is the 99-01 B20 model

96 = 126 and 99 = 146 hp right and same torque

The only thing I have found was that the 99-01 models have a different intake or somewhat a box on top of the intake manifold from looking at it.

Any other clues and tips? I am planning to buy the 99-01 B20 for my new Integra and need help to see if I buy want I am paying for!
 

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lots of differences

The 96-98 CRVs had the B20B engine. The 99-01 CRVs had the B20Z engine (also named B20B - different names depending where the V was made).

Lots of things are different about the engine. The engine does not include the funky plenum on top of the intake manifold.

The following is from wikipedia:
http://en.wikipedia.org/wiki/Honda_B_engine#B20

B20B
1996-1998 specs
NON-VTEC
Found in: USDM and JDM Honda CR-V, Honda Orthia
Displacement: 1,973 cc (120.4 cu in)
Power: 126 hp (94 kW)) @ 5400 rpm
Torque: 131 ft·lbf (178 N·m) @ 4300 rpm
Rod length: 137 mm (5.4 in)
Compression: 8.8:1 or 9.2:1
Bore: 84 mm (3.3 in)
Stroke: 89 mm (3.5 in)
Redline: 6300 rpm

B20B/B20Z
1999 - 2000 specs
NON-VTEC
Found in: USDM CRV as a B20Z, JDM Honda CR-V and Honda Orthia as a B20B
Displacement: 1,973 cc (120.4 cu in)
Power: 146 hp (109 kW)) @ 6200 rpm
Torque: 133 ft·lbf (180 N·m) @ 4500 rpm
Rod length: 137 mm (5.394 in)
Compression: 9.6:1
Bore: 84 mm (3.3 in)
Stroke: 89 mm (3.5 in)
Redline: 6700 rpm

You can also read this website which discusses the further differences that wikipedia is unaware of:

http://web.archive.org/web/20060223224918/http://nonvtec.com/board/viewtopic.php?t=2543

Good luck!
 
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