0.92 T4 Twin Scroll IWG 12809880000 for this item. ALL BORGWARNER EFR SERIES TURBOS AVAILABLE. 0.92 T4 Twin Scroll IWG. EFR 9180 is the biggest, baddest, highest flowing turbo in the EFR family. Utilizing the identical design and material turbine and compressor wheels as Honda’s IndyCar 2.2L single turbo engines, EFR9180 is ideal for use as single turbo applications in the 700-1000hp per turbo range, or as very high power twin turbo applications >1000-1700+hp.
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