Anyone know what type uf muffler is in the extensions like Jegs sells? I was thinking of running a sprint style header, BBC 3.5 collector, so I was looking for some slip on pipes with a turn out, I was going to try a couple of Speedways auger inserts in each side but I noticed while doing some research that Jegs had them, 26 in long, with mufflers or without. Not expecting something really quite but wondering if anyone has run any of these.
I'm running 12" Spiral Turbo baffles in Speedway 3.5" extensions and they are sorta loud on an SBC. Their other option is a glasspack inserted in the extensions. Not as loud, but maybe more back pressure?
I figured the extensions with mufflers had the glass pack deal in them. It doesn't say, I was thinking of buying them without mufflers and installing 2 auger inserts in each side.