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MANLEY 11885-8 Exhaust Valve Kit Race Series (1.940" Head Dia., 5.422" O/A Length, 0.3415" Stem) for CHEVROLET Big Block ymm_17 Changing the calibration of the ymm_23

SKU 47433739321 · ★ 4.1

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Description

MANLEY 11885 8 Exhaust Valve Kit Race Series (1.940" Head Dia., 5.422" O A Length, 0.3415" Stem) for CHEVROLET Big Block ymm_17 Changing the calibration of the ymm_23 Changing the calibration of the MAF sensor necessitates tuning changes to recalibrate the ECU Description JE 338257 Piston Kit (4 Swirl polished underhead areas and fully machined combustion faces optimize Airflow and combustion efficiency Recommended for Alcohol Engines: These valves are recommended for exhaust valves in alcohol engines

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