

| Sizes | STD, .025, .25, .50 |
| Oil Clearance | Standard |
| Half Type | Upper & Lower |
| Material | Tri-Metal |
| Min. Std Shaft Size | 2.6373in / 66.987mm |
| Max. Std Shaft Size | 2.6378in / 67.000mm |
| Min. Std Tunnel Size | 2.8346in / 71.999mm |
| Max. Std Tunnel Size | 2.8352in / 72.014mm |
| Max Wall at Crown | 0.0981in / 2.491mm |
| Max Overall Length | 0.8858in / 22.5mm (8088H/HX) 0.7677in / 19.5mm (8089H/HX) |
| Weight | 0.45 |
| Notes | This part has no notch. |

|
Product detailed specification |
|
|
Bore size |
87.25mm |
|
Stroke |
91.00mm |
|
Mahle compression ratio (CR) |
11.5:1 |
|
OEM compression ratio (CR) |
11.3:1 |
|
Dome volume (CC) |
-13.1cm3 |
|
Compression height (CH) |
32.30mm |
|
Pin diameter |
21mm |
|
Features |
Accepts Turbo and Nitrous |
|
Fits for |
BMW M3 E46 - 3.2 S54B32 |


ARP sind ein Hersteller von Verbindungselementen (Bolzen und Stehbolzen) im Motoren und Antriebsstränge, die von OEM-Ersatzteile zu Spezialhardware für den Rennsport gefunden.
ARP ist weltweit führend in der Befestigungstechnik.


|
Part number starting with 330 |
|
|
Athena advantages |
|
|
Reinforced material |
Asbestos free composite raw material OE approved |
|
Stainless steel ring (AISI304) |
Separate stainless steel rings assure maximum sealing around cylinder bore also on NOS and/or turbo charged engine where boost is over 2 bars. No head and block machining required |
|
Silicon beading |
Silicon-based beading is applied on critical areas to improve sealing around all cooling water and oil passages |

| Wireless RF transmission immune to all interference in the car. | |
| 8 pushbutton switches. | |
| 4 rotary switches. | |
| Low power consumption. | |
| Easy to replace three AAA batteries. | |
| Battery level transmitted over CAN-bus. | |
| Bespoke carbon case. | |
| Direct integration with other CAN-bus devices as a CAN Switch Board V3. |

| 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 |
92.50mm |
|
Stroke |
75.00mm |
|
JE Pistons compression ratio (CR) |
9.5:1 |
|
OEM compression ratio (CR) |
8.0:1 |
|
Dome volume (CC) |
-3.8cm3 |
|
Compression height (CH) |
32.70mm |
|
Pin diameter |
23mm |
|
Features |
Accepts Turbo and Nitrous; FSR series Skirt, Ultra series |
|
Fits for |
Subaru Impreza WRX STI - 2.0 16V (EJ20, EJ205, EJ207) |



