Thinking about putting headers on my 2002 Honda Accord.
Am I going to run into any issues when I do that with sensors or anything I'm also going to heat wrap the exhaust as well stock motor

 

You would put a header on it, not a pair of headers.

The stock exhaust manifold is a decent design for the stock engine. You will not see any gains swapping over to any of the aftermarket "performance" units available.

 

Thanks yep header. Grew up working on V8 habit