Exhaust and warranty?

[Mr 5 0]

Duel exhaust systems are available for your 3.8 Mustang and it will improve gas mileage and of course, the sound.

Read your warranty information carefully to determine how an aftermarket exhaust might affect the warranty, if at all.

As for salesmen...remember, they are only there to sell cars and often, your sale will pay the rent that month so the temptation to tell you whatever will convince you to buy the car is what he'll/she'll say.
Many salespeople are only trained in 'selling' and don't really know much about the car, the warranty or anything else.
Sad but true in many cases.

I know, I used to sell Fords at a dealership.

It was all 'sell-sell-sell' and 'do what it takes' and customer satisfaction was a distant second in importance to sales volume, despite constant (public) claims to the contrary by the dealership.