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Spool Helix HPFP Overdrive Unit – BMW 135i 335i E8x E9x N54 N55 Engine:N54 carbon fibre airbox with air The system is designed carbon fibre airbox with air filter The GFB Deceptor Pro 2 offers the ultimate flexibility to customise the sound of your Blow Off Valve to your liking • Type: HPFP overdrive unit•Application: OEM HPFP (N54 early N55)• Function: Increased displacement viaoverdrive• Fuel: Petrol • Helix: suitable for up to 600 whp onE85• Helix Xtreme: higher capacity
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