Originally Posted by dig
Just talked to my buddy today about my muffler and tailpipes. He laughed, He does race cars and is doing a 600hp chevy right now. He says that he is installing 2.5" pipes and that is as big as you need for 600hp. So why do you need more then what you have stock for 390hp. He also got a good laugh about the Y pipe. He said people think just because it is louder it is more powerful. He has been doing this for a lot of years. So I do have to consider what he says. I'm just quoting him. No let her rip.
Here is the issue with your buddies statement. While he is correct that 2.5 is more than enough for our trucks and his 600hp chevy. I can assure you like previously posted that he is not using a stock OEM muffler or OEM cats/headers. I would be REALLY surprised to see him running cats period in a race car. PLUS I would almost bet that his exhaust is not taking the same path that was OEM on that chevy. Right? Its all about restricted airflow and thats what comes from OEM... restricted exhaust.
The previous statement about losing performance with an aftermarket exhaust. I find that hard to believe... what i would believe more of is them loving the sound of their exhaust and reving it more or them putting their foot into here and there to hear the sound. Thats more likely. Everyone is a victim to doing that. If we werent then why waist the money on the aftermarket part?