Performance Upgrades

Production starts once order confirmation/ payment is received.

All products are built to order and shipped within 10 business days, with a tracking number provided. We often keep a few on the shelf, so it may be sooner.

No fuss conversion! We do all the work, you drive it in and drive it out converted with after support.

Products we manufacture carry our Limited Lifetime Warranty (10 years minimum, and beyond at our discretion). For turn-key conversions, we separately guarantee our installation and workmanship — the period is confirmed in writing at booking. See our full terms for details.

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Performance Upgrades

BMW M57 / M57N/ M57N2 Valve Spring Upgrade

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Performance Upgrades

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BMW M57 / M57N/ M57N2 Valve Spring Upgrade