Whats needed for a custom downpipe/hfc?

[JoeSpeed]

Just curious, want to add more power and dont wanna wait, just fee like getting either a 200 cell or o2 sensor and having the shop next door fab me one.

is there more to it then just paying for parts and labor or could I even cut the current one and just slap a smaller one to replace it?

thanks in advance

Sponsored

 

[JoeSpeed]

Would this work? Would I need to have an 02 sensor installed or naw?

https://www.cjponyparts.com/flowmaster-catalytic-converter-3-mini-metallic/p/2000130/