Toyota 4U-GSE / Subaru FA20 Rebuild Kit
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This Rebuild Kit includes the following quality parts:
- Spool Forged I Beam Conrods
- CP Forged Pistons
- Pistons come with rings and gudgeon pins - No locks supplied, use factory locks
- 2x Cometic MLS Head Gasket
- ACL Race Series Main Bearings - STD or 0.25mm
- ACL Race Series Big End Bearings - STD or 0.25mm
EJ255 Pistons are available in:
- Bore: 86mm (STD) / Comp: 9.0:1 - Part#: SC7402 - Special Order
- Bore: 86.5mm (+0.5mm) / Comp: 9.0:1 - Part#: SC7403
- Bore: 86mm (STD) / Comp: 10.0:1 - Part#: SC7405 - Special Order
- Bore: 86.5mm (+0.5mm) / Comp: 10.0:1 - Part#: SC7406
- Pistons come with rings, gudgeon pins and pin locks
Spool Connecting Rods Feature:
- ARP 2000 fasteners (L19 fasteners are available as an upgrade)
- High tensile 4340 forged steel
- 2 Piece forging
- Hardness of HRC36-42
- Dowelled caps for precision alignment
- X-RAY & Sonic tested
- Quenching and heat treated
- Shot peened
- 100% Magnafluxed
- Weight Matched Sets +/- 1 gram
- Vacuum degassed to remove impurities
CP Pistons standard features include:
- 5310 gudgeon pins (9310 thicker wall thickness pins are available as an upgrade)
- Deep valve reliefs accommodate high lift camshafts
- Larger valve reliefs for +1mm valve sizes
- Custom skirt cam and barrel design
- Accumulator grooves
- High strength aluminium forgings
- High performance rings
- Fully CNC machined and balanced to +/- 1 gram
- Wrist pins included
- Double pin oilers force fed from oil ring groove
- Pick lock grooves for easy lock removal
- Pin fitting included
| Product Name | Toyota 4U-GSE / Subaru FA20 Rebuild Kit |
|---|---|
| Brands | Spool |
| Engine | FA20, 4U-GSE |
| Make | Subaru, Toyota |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
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Disclaimer:
Product images are for description purposes only. Actual product may vary.
Shipping calculations available at checkout.
If you are unsure, get in touch by emailing [email protected], messaging us on Facebook, or phoning us at +61 7 5645 1333 (8am to 2pm AET).
What is included in a typical Spool engine kit?
Kits usually include pistons, rings, rods, bearings and related hardware depending on the engine family. Check the listing for exact inclusions.
Do I still need machining with a full engine kit?
Yes. The block must be honed and all clearances checked and set by your builder. Assembly should only occur after full measurement and verification.
What are the recommended clearances for the ACL Race Series bearings included in the FA20 rebuild kit?
The recommended clearances for ACL Race Series bearings depend on your specific application and intended use. Generally, for standard performance builds, aim for oil clearance of 0.0015" to 0.0025" for main bearings and 0.0010" to 0.0020" for big end bearings. Always verify with your engine builder for optimal clearances based on your setup.
Can I use the CP pistons with factory locks, and what should I consider when installing them?
Yes, the CP pistons in this kit are designed to be used with factory locks. When installing, ensure that the gudgeon pins are properly fitted and that the piston-to-wall clearance is set according to the manufacturer's specifications. It's also important to check the ring gaps and adjust them based on your engine's application and boost levels.
What is the significance of the dowelled caps on the Spool conrods in this kit?
The dowelled caps on the Spool conrods provide precision alignment during assembly, which is crucial for maintaining consistent bearing clearances and reducing the risk of failure under high loads. This feature enhances the overall reliability of the conrods, especially in high-performance applications.
What should I know about the Cometic MLS head gaskets included in the kit?
The Cometic MLS head gaskets are designed for high-performance applications and require a proper surface finish on the cylinder head and block for optimal sealing. Aim for a surface finish of 50 RA or better. Ensure that the head bolts are torqued to the manufacturer's specifications to prevent leaks and maintain cylinder pressure.
Are there any specific tuning considerations when using this rebuild kit for the FA20 engine?
Yes, when using this rebuild kit, tuning is critical to ensure reliability and performance. Consider factors such as compression ratio, fuel quality, and boost levels. Proper tuning will help you achieve the desired power output while maintaining engine reliability. Work closely with a knowledgeable tuner to optimise your setup.
