High Performance Valve Spring Kit | BMW S55/S58/B58 BMW-X5-M-2017

High Performance Valve Spring Kit | BMW S55/S58/B58 BMW-X5-M-2017Steve Dinan has been building racing and high performance road car engines for over 40 years. We are concerned about the trend in high performance valve springs on the new S55, S58 and B58 engines. Companies are selling springs with very high spring rates that will rob power and dramatically increase valve train wear. Theory The goal of a valve spring pressure is to make it as low as possible. This is because compressing a spring takes energy and robs

Type Calculated Flywheel Power Measured Wheel Power OEM Stock 716HP / 705TQ 578WHP / 578WTQ Tuned 777HP / 750TQ 637WHP / 615WTQ

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The race car heat exchanger is significantly lighter weight

Stage 3 software

This heat exchanger slashes those temperatures

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M4 are new not rebuilt units

Easy Installation: Designed for a seamless fit with minimal modifications required

Enhanced Aesthetics: Achieve a flush fitment

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If your vehicle is outside of the vehicle manufacturer’s new car limited warranty

Whether you're on the street or the track