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Kooks 98-02 F Body LS1 5.7L 3in SS Cat Dual Exhaust Chevrolet Astro LS 1996 to 1999 GMC Sierra 3500 HD DenaliAir Freight Prohibited: false Not Carb Approved: true Carb Acknowledgement Required: t Ltl Freight Required: false Prop 65: Y Epa: Testing Kooks Headers and Exhaust has been the leader in the High Performance Exhaust Industry for over 50 Years! Since 1962, Kooks takes pride in offering the best headers and complete exhaust systems for your street, race and off road applications. We have won hundreds of championships and set countless records in the