Hello all , I recently bought a flowmaster 17234 kit for my 87 gta . I wanted to post a couple pictures and get your thoughts please. Looks like theirs conflicting numbers on the muffler box but the number stamped in muffler itself seams correct for the application. The muffler also has 2 inlets and one out ? So what I think I have here is a 50 series not a 80 crossflow . Just wanted your opinions please as your probably seen this before. Thanks all

 

Looks like an 80 series..

Flowmaster 53083 80 Series Crossflow Muffler, 3.00" IN (O) / OUT (D), 5x10 16 Gauge (holley.com)

 

2 inlets on the same side, one outlet on the other side looks like a GM truck muffler (like for an '06 Silverado).

 

Yeah the part # on (fl133p)
the box and the dual inlet is throwing me off . Every crossflow muffler I see you can look through the outlets from one side to the other.