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The amount of streetable horsepower that your going to loose is not even worth thinking about. Run a 2.5" cast "Corvette " ramhorns feeding dual mufflers and you will be good.


You dont need headers or a x pipe. It is a looks thing that is it. If you want side pipes then run side pipes just hide a muffler inside the heatshield.

Street rpm we are talking about never going above 3500rpm on a 250hp sbc.

You can dump $1000 into headers and straight sidepipes and may see a 10hp increase at 3500rpm over the simple cheap easy to work on and run setup I listed.

Until you get above 350hp most factory style dual setups are up to the task for street driven rides while giving a sound that won't set off car alarms each and every time you pull into a parking lot.

Been there. Run a 2.5" system with a idle you can talk to each other in front of the car and you will be good.
 
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