


| Position | |||||||
|---|---|---|---|---|---|---|---|
| Pairs & PN |
|
||||||
| Quantity | 1 | ||||||
| Crankshaft | 66.965 / 66.972 | ||||||
| Housing | 0.000 / 0.000 | ||||||
| Max Wall | 2.510 | ||||||
| Max Length | 18.352 |


| Position | |||||||
|---|---|---|---|---|---|---|---|
| Pairs & PN |
|
||||||
| Quantity | 4 | ||||||
| Crankshaft | 47.813 / 47.833 | ||||||
| Housing | 51.331 / 51.346 | ||||||
| Max Wall | 1.730 | ||||||
| Max Length | 20.599 | ||||||
| FL O/S |

| ENGINE BEARINGS | ||||
![]() |
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 |
![]() |
2908H & HX - Positions 1,2,4,5
2909H & HX - Position 3
|
||
| THRUSTWASHER SET | ||||
| Part# | Material | |||
| Sizes | Notes | - | ||


|
Product detailed specification |
|
|
Bore size |
82.50mm |
|
Stroke |
90.30mm |
|
Wiseco compression ratio (CR) |
9.0:1 |
|
OEM compression ratio (CR) |
10.0:1 |
|
Dome volume (CC) |
-26.2cm3 |
|
Compression height (CH) |
32.38mm |
|
Pin diameter |
20mm |
|
Features |
Accepts Turbo and Nitrous; Full Round Skirt |
|
Fits for |
VW VR6 - 2.8 2.9 12V (AAA, ABV) |










