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   Hooker Turbo Exhaust Manifolds part # 8510HKR via Marken Performance fits GM LS engines (except LS7 & LS9) and does not fit 2004-’06 GTO.  These manifolds are made from High-Silicon-Moly ductile iron and are much more durable & retain more heat than fabricated headers.  The manifolds kits include v-band clamps & flanges, heater hose heat shield, and header bolts.  A turbo cross-over tube is used to connect the 2 manifolds (sold separately).

   For more info watch Video 

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