
|
Bore size |
99.50mm |
|
Stroke |
79.00mm |
|
|
8.5:1 - 56cc cylinder head 9.1:1 - 50cc cylinder head |
|
OEM compression ratio (CR) |
8.0:1 |
|
Dome volume (CC) |
-19.25cm3 |
|
Compression height (CH) |
30.70mm |
|
Pin diameter |
23mm |
|
Features |
4032 material |
|
Fits for |
Subaru WRX STI 2.5 (EJ257) |

|
Product detailed specification |
|
|
Bore size |
82.50mm |
|
Stroke |
86.40mm |
|
JE Pistons compression ratio (CR) |
9.0:1 |
|
OEM compression ratio (CR) |
9.3:1 |
|
Dome volume (CC) |
-5.70cm3 |
|
Compression height (CH) |
30.70mm |
|
Pin diameter |
21mm |
|
Features |
Accepts Turbo and Nitrous; Round skirt |
|
Fits for |
Audi S4, RS4, A6 - 2.7 30V |



|
Product detailed specification |
|
|
Bore size |
86.50mm |
|
Stroke |
86.00mm |
|
Wiseco compression ratio (CR) |
8.8:1 |
|
OEM compression ratio (CR) |
9.0:1 |
|
Dome volume (CC) |
-18cm3 |
|
Compression height (CH) |
30.43mm |
|
Pin diameter |
21mm |
|
Features |
Round piston skirt |
|
Fits for |
Opel - 2.0 16V (C20LET) |


|
Product detailed specification |
|
|
Bore size |
85.00mm |
|
Stroke |
88.00mm |
|
Wiseco compression ratio (CR) |
8.5/9.0:1 |
|
OEM compression ratio (CR) |
8.3:1 |
|
Dome volume (CC) |
-14cm3 |
|
Compression height (CH) |
35.00mm |
|
Pin diameter |
22mm (5,72mm wall tool steel pin) |
|
Fits for |
Mitsubishi EVO 2.0 16V Turbo (4G63) |


|
Bore size |
99.75mm |
|
Stroke |
79.00mm |
|
|
8.5:1 - 56cc cylinder head 9.1:1 - 50cc cylinder head |
|
OEM compression ratio (CR) |
8.0:1 |
|
Dome volume (CC) |
-19.25cm3 |
|
Compression height (CH) |
30.70mm |
|
Pin diameter |
23mm |
|
Features |
4032 material |
|
Fits for |
Subaru WRX STI 2.5 (EJ257) |

|
Product detailed specification |
|
|
Bore size |
81.50mm |
|
Stroke |
86.40mm |
|
JE Pistons compression ratio (CR) |
9.0:1 |
|
OEM compression ratio (CR) |
9.3:1 |
|
Dome volume (CC) |
-7cm3 |
|
Compression height (CH) |
30.70mm |
|
Pin diameter |
21mm |
|
Features |
Accepts Turbo and Nitrous |
|
Fits for |
Audi S4, RS4, A6 - 2.7 30V |

| ENGINE BEARINGS | ||
![]() |
MAIN BEARING SET |
|
| Part# | ||
| 5M1644H |
5M1644HX |
|
| Sizes | STD, .25, .50 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Upper & Lower | |
| Material | Tri-metal | |
| Min Std Shaft Size | 2.1243in / 53.958mm | |
| Max Std Shaft Size | 2.1251in / 53.978mm | |
| Min Std Tunnel Size | 2.3228in / 59.000mm | |
| Max Std Tunnel Size | 2.3236in / 59.019mm | |
| Max Wall at Crown | 0.0985in / 2.502mm | 0.0980in / 2.489mm |
| Max Overall Length | 0.728in / 18.49mm | |
| Notes | Set contain 6 x 1648H and 4 x 1644H shells. Use 1648H shell in #4 position as upper and lower. | |
|
Diagram |
|
|