I would ask Brian at BNR. If anyone could tell you detailed specs, its him!!!
I remember reading somewhere about specs of S4 vs S5 as far as A/R and compressor efficiency tables, but I can't find it anymore.
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1976 Mazda Cosmo RX-5
1976 Mazda Cosmo RX-5
2003 Toyota Tundra TRD
2015 Toyota 4Runner SR5
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