Seller notes

P/N 013-1220 Item Name MAMBA Turbine Housing fits Subaru Impreza WRX STI Spec C RHF55X (51.1/56/P25/Single Scroll) Product Situation Brand New Application MAMBA RHF55X-18G journal bearing turbo or cartridge. This turbine housing converts factory IHI twin scroll to single scroll to support higher top end if user install larger compressor wheel such as MAMBA RHF55X-18G. Warning: Not for IHI RHF55 journal bearing or RHF5HB ball bearing turbo. Single scroll turbine housing will spool 300~500 rpm slo...

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