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RalliSpec EJ25 Long Block - Stage 1
Every block is professionally assembled in our dedicted engine building room by RalliSpec's in-house builder who has over 20 years of motorsport level Subaru engine experience and has built hundreds of Subaru high performance engines. Every block is blueprinted to carefully designed specifications that balance extended service life with extreme power capabilities. Every dimension is logged and a build spec sheet is provided for reference.
[NOTE] Long Blocks Consists of the short block fitted with complete heads, oil pump, valve covers, and cam seals. Long blocks DO NOT include any timing components (cam gears, idlers, pulleys, belts, covers, tensioners and etc) or oiling components (pan, baffle, pickup & etc) beyond the pump.
| Block Specs | Street Standard | Street Pro Value | Stree Pro | Race Basic | Race Standard | Race Pro | Race Pro + |
|---|---|---|---|---|---|---|---|
| Block Case Type | EJ25 Semi-Closed | EJ25 Semi-Closed | EJ25 Semi-Closed | EJ25 Semi-Closed | EJ25 Closed Deck | EJ25 Closed Deck | EJ25 Billet/Sleeved |
| Block Hardware | OEM | OEM | OEM | OEM | OEM | ARP | ARP |
| Pinned Mains | ✓ | ✓ | |||||
| Fire Lock Groove | ✓ | ✓ | ✓ | ||||
| Bore Size | 99.5mm | 99.75mm | 99.75mm | 99.5mm | 99.75mm | 99.75mm | 99.75mm |
| Crankshaft | 79mm Nitrided | 79mm Nitrided | 79mm Nitrided | 79mm Nitrided | 79mm Nitrided | 79mm Manley | 79mm Arrow |
| Connecting Rods | 4340 H-STD | 4340 H-STD | 4340 PRO Tri-Beam | 4340 H-STD | 4340 PRO Tri-Beam | 300M PRO Tri-Beam | 300M PRO Tri-Beam |
| Rod Bolts | ARP2000 | ARP2000 | ARP L19 | ARP2000 | ARP L19 | ARP 625+ | ARP 625+ |
| Pistons | Cosworth | Cosworth | Cosworth | Omega HD | Omega HD | Omega HD | Omega HD |
| Piston Pins | 0.220in | 0.220in | 0.220in | 0.240in | 0.240in | 0.240in w/ DLC | 0.240in w/ DLC |
| Main Bearings | ACL | ACL | Coated ACL | ACL | Coated ACL | Coated ACL | Coated ACL |
| Rod Bearings | Coated ACL | Coated ACL | Coated Clevite | Coated ACL | Coated Clevite | Coated Clevite | Coated Clevite |
| Head Stud Threads | 11mm | 11mm | 14 x 2.00mm | 11mm | 14 x 2.00mm | 14 x 2.00mm | 14 x 1.50mm |
| Balance Precision | 1g | 1/2g | 1/3g | 1/2g | 1/3g | 1/3g | 1/3g |
| Compression Ratio | 8.2 (8.6) | 8.2 (8.6) | 8.2 (8.6) | 8.2 (8.6) | 8.2 (8.6) | 8.2 (8.6) | 8.2 (8.6) |
| High Compression Ratio | 9.4 (9.9) | 9.4 (9.9) | 9.4 (9.9) | 9.4 (9.9) |
| Stage 1 Cylinder Head Package |
|---|
| New Head Castings |
| Ferrea Competition/Super Alloy Valves STD Size |
| GSC Beehive Valve Springs & Ti Retainers |
| Kelford Camshafts |
| Cam Seals |
| OEM Valve Lifters |
| ARP CA625+ 11mm or RCM 14/12mm Head Studs |
| RCM or Fire Lock Head Gaskets |
| RalliSpec HP 11mm Oil Pump w/ Hardware & Seals (EJ) |
| Valve Covers |
| Valve Cover Gaskets & Hardware |
| NGK Iridium Spark Plugs |
| Performance Valve Job & Bowl Blend |
| Assembly |
[ Long Blocks are built to order please accommodate for build and shipping times ]
[ Long Blocks will be shipped through freight. Please select in-store pick up so you are not charged for more shipping. Will only ship to the contential US 48-States. ]
From $10,150.00
To $24,600.00
SKU
RalliSpec EJ25 Long Block-1
Whether race, rally, or road, RalliSpec Ltd. is dedicated to providing cutting edge solutions to your automotive performance needs. Since our inception in 1999 we have offered an unrivaled level of expertise and support to a growing list of clientele around the world. The technical partnerships we have forged with top level motorsports teams as well as our past in-house racing efforts have provided valuable insight. We pass this knowledge on to you so that the path to achieving your performance goals will be the most direct and cost effective one. While we have maintained a special focus on Subaru performance development, our experience is broad based and we are happy to assist with any high performance automotive project.
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to P65Warnings
| SKU | RalliSpec EJ25 Long Block-1 |
|---|---|
| Brand | RalliSpec |