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Well the Iroc Z like all other camaros came with an option for its engines, in 1985 they offered The 305 TPI LB9 was rated at 215 hp (160 kW) with the 305 LG4 at 155 and the High Output 4 barrel 305 L69 at 190HP. 1986 they offered, This was the final year for the L69 5.0 305 HO 4bbl option, and the 2.8 L V6 was now the standard engine in the base model, replacing the 2.5 L I-4 model. The 305 TPI LB9 horsepower rating dropped from 215 hp (160 kW) to 190 hp (142 kW) in the IROC-Z models. Chevrolet did build 75 IROC-Zs with the L98 5.7 L 350 TPI engines rated 220 HP @ 4200 RPM and 320 lbs/ft @ 3200, but these cars were not equipped with A/C and not believed to be sold to the general public because they were test vehicles.

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Q: What size motor comes standard on the Camaro Iroc Z?
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