This is a custom system made for a 997.1 GT3 cup with a 4.0 l conversion that has 500 hp+ - header diameter 55mm - tube diameter 76mm after the headers - recommended for engines 500 hp+ all motorsport and racing parts are special order items. Special order items must be paid for in advance. Special order items are sold on a non-cancelable, non-exchangeable, non-returnable, non-refundable basis and do not carry any warranty. No exceptions.

This item may need to be sourced from Germany and would take 2-4 weeks to arrive. Once ordered it cannot be canceled. Please call to check stock or request expedited shipping.