exhaust collector?

[tupeloranger4x4]

i bought my flowmaster 40 today finally!its 2.5 in 2.5.i want to kno if i can buy a collector that i can put a 2.5 pipe on to go straight to the muffler without reducers to get the pipe to 2.5.need one to fit to the stock pipe after the cat

 

[Ranger#1]

what about the cats

 

[tupeloranger4x4]

want to bolt a new collector in after the cat.dont plan on takin it out