Dial in your power band
The Evolution International E90 Performance Center spring is built for players tuning an AEG toward a 300+ fps performance setup. It gives you a known starting point for a controlled, repeatable power level rather than guesswork.
Made for high-torque builds
Evolution designed the E90 with high-torque upgrade builds in mind, where a strong motor and gearing pull the spring efficiently for snappy, consistent shots. It is a sensible choice when you are rebuilding a gearbox for reliability and shot-to-shot consistency.
Italian-made quality
Precision wound from quality steel and made in Italy, the spring is engineered to hold its rate and resist sag over long use, so your FPS stays stable game after game instead of drifting down over a season.
Fit it right
A spring swap is only as good as the parts around it. For best results, match it to a proper spring guide, piston and motor, and confirm your air seal is sound. Chronograph the finished build so you know your true output.
Let our techs handle it
Not confident stripping a gearbox? Our workshop can fit and tune it for you. See our airsoft gun repair and servicing in Kent, or browse more airsoft accessories and upgrade parts.
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