Using an exhaust diameter calculator the rough ID allowing my engine to breathe fully is 2.8", with 2.5" being an 80% capacity second place. I like the looks of my sidepipes and would like to use them, but haven't yet found anything of 2.75" ID.... I'll call around to see if anyone would make that... I'm wondering if filling the remaining 1/4" surrounding space with fibreglass would make any sound muffling impact. I've driven the car with open sidepipes and it's a gas, but whoa...too loud for me!
Can't have my cake and eat it too....but maybe have half my cake and eat the other half lol
Dirk