Our STILLEN exhaust for the Maxima is the best system available. Construction is all mandrel bent tubing for performance and T304 stainless is used on our Polished Tips, End Pipes and , matte piping. On some applications, the mufflers may be polished 409 stainless for long life in any climate. Straight through Mufflers are wrapped in an exclusive Italian granite wool for long life and responsible sound level. Available as a Rear Section exhaust or Full Cat Back . The end result is increased torque and power.