how you doing everybody i am new in the evo area. I buy my evo 5 months ago it has and original engine with 37,867 miles. I am in love of this car the only thing when i buy it in the dealership was the exhaust was change. It has a huge exhaust HKS i dont know if is 4" but i hate it. I feel this is a huge exhaust for a stock turbo engine and the performance. I am starting to do modifications on the engine and i dont know how to start. I want to know if the exhaust will hurt me if the engine is stock. any advice. thanks

 

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