Big Boss Series 60 Exhaust Manifold. CARB EO # D773-2. Constructed from a high-silicon molybdenum ductile iron (HSMD) material. Increases airflow up to 20 over the OEM exhaust manifold. Lowers EGT (exhaust gas temperature) by 75-100 degrees. Provides a balance in exhaust pressure to turbocharger boost pressure ratios. Reduces engine turbocharger lag. Emissions: CARB EO […]

Big Boss Series 60 Exhaust Manifold. CARB EO # D773-2. Constructed from a high-silicon molybdenum ductile iron (HSMD) material. Increases airflow up to 20 over the OEM exhaust manifold. Lowers EGT (exhaust gas temperature) by 75-100 degrees. Provides a balance in exhaust pressure to turbocharger boost pressure ratios. Reduces engine turbocharger lag. Emissions: CARB EO […]