
| ENGINE BEARINGS | ||||
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CON ROD BEARING SET |
MAIN BEARING SET |
||
| Part# | Part# | |||
| 4B2904H |
4B2904HX |
5M2908H |
5M2908HX |
|
| Sizes | STD, .025, .25 | STD | STD, .025, .25 | STD |
| Oil Clearance | Standard | + 0.001" Extra | Standard | + 0.001" Extra |
| Half Type | Identical Halves | Upper & Lower | ||
| Material |
Tri-metal Hardened steel backs |
Tri-Metal | ||
| Min Std Shaft Size |
1.9995in / 50.787 mm |
2.0862 in / 52.991 mm |
||
| Max Std Shaft Size |
2.0003in / 50.807 mm |
2.0866 in / 53.000 mm |
||
| Min Std Tunnel Size |
2.1219 in / 53.897 mm |
2.2330 in / 56.717 mm |
||
| Max Std Tunnel Size |
2.1226 in / 53.913 mm |
2.2337 in / 56.735 mm |
||
| Max Wall at Crown |
0.0605in / 1.536 mm |
0.0600in / 1.523 mm |
0.0726 in / 1.843 mm |
0.0720 in / 1.830 mm |
| Max Overall Length |
0.768 in / 19.50 mm |
0.817 in / 20.75 mm (2908H/HX) 0.955 in / 24.25 mm (2909H/HX) |
||
| Notes | - | - | ||
|
Diagram |
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2908H & HX - Positions 1,2,4,5
2909H & HX - Position 3
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| THRUSTWASHER SET | ||||
| Part# | Material | |||
| Sizes | Notes | - | ||





|
Product detailed specification |
|
|
Bore size |
89.00mm |
|
Stroke |
88.30mm |
|
JE Pistons compression ratio (CR) |
10.0:1 |
|
OEM compression ratio (CR) |
10.0:1 |
|
Dome volume (CC) |
-9cm3 |
|
Compression height (CH) |
32.00mm |
|
Pin diameter |
22mm (HD) |

|
Product detailed specification |
|
|
Model number |
BMIVN-1055S |
|
Head diameter |
32.00mm |
|
Stem diameter |
4.97mm |
|
Length |
104.9mm |
|
Material |
Black nitrided stainless steel |
|
Fits for |
BMW E60, E90, E91, E92, E93, E82, E88, E89, X6, Z4, F01 - 3.0 (N55B30, S55B30) |


|
Product detailed specification |
|
|
Bore size |
97.00mm |
|
Stroke |
83.00mm |
|
JE Pistons compression ratio (CR) |
10.5:1 |
|
Dome volume (CC) |
-5.5cm3 |
|
Compression height (CH) |
29.87mm |
|
Pin diameter |
23mm |
|
Features |
Accepts Turbo and Nitrous; HD pins |
|
Fits for |
Porsche Cayenne (9PA) 4.8 32V (M48.51) |