I got a quote for a 2 1/4” true dual exhaust, manifolds back, for my 85 Monte SS. Flowmaster 40 series mufflers with new crossmember and trans mount $1275 out the door. They make the pipes in house so I’m assuming it’s aluminized steel, will clarify tomorrow. I’ve never paid for an exhaust so not sure what is fair. I’m in Michigan. Haven’t received a call back from the other 2 muffler shops I tried to get quotes from. Any feedback on pricing is appreciated.