RCM / Omega Piston Set – WRX & STI 1992-1998 (V1-V4) EJ20
£779.99
Forged piston set manufactured by Omega Pistons for the EJ20 engine in WRX/STI models from 1992-1998 (V1-V4). Supplied in 92.00mm standard bore plus 92.25mm and 92.50mm oversize. Listed for GC/GF-chassis Impreza.
SKU:
EKS Fitment Advice
EKS currently identifies this product as Direct Fitment
Compatibility of any product, greatly depends on model + year + trim + mods. Most Subaru’s are in different states of tune, so please contact Rich, from EKS to get clarity before purchasing.
Potential Applications
Subaru Impreza 1992-2000 (GC/GF)
Full List of EKS Fitment Evidence Types
For context, here are all categories of fitment according to EKS.
- Direct Fitment: means the product is currently listed as fitting the model/generation shown.
- Shared / Application Fitment: means the product may suit shared Subaru platforms, engines, turbos, drivetrains, brakes, cooling/intake setups or modified applications.
- Universal / Service Item: means the product is broadly useful for Subaru servicing, maintenance, workshop use or general ownership.
- Needs Confirmation: means the product appears relevant, but final fitment may depend on extra details.
Product Description
This is a forged piston set manufactured by Omega Pistons for the Subaru EJ20 engine, as fitted to WRX and STI models from 1992-1998 (V1-V4).
Pistons are forged rather than machined from a solid billet, which Omega state gives a more consistent grain structure and added strength for high-load use. Each piston is individually weighed and batched, with a manufacturer-stated tolerance of within 0.5g per piston and no more than 2.0g deviation across a set of four.
Supplied in 92.00mm standard bore, plus 92.25mm and 92.50mm oversize. Listed for GC/GF-chassis Subaru Impreza (1992-2000).



























