how hard is it to change out the intake manifold while the motor is in the car? its a gsr swap civic if it matters.

 

Very easy. A good universal joint socket adaptor comes in handy, along with a 10" extension for the lower center nut.

What you do afterwards is the hard part...

 

its pretty its just a PITA to get under the car and get the bolts from under the manifold. also your dont forget to remove the stock bracket that holds that manifold to the block i think it is. when i was changing my manifold on my gsr i didn't know about it till i tried pulling it off lol. other then that its pretty easy cuz dont mix any coolent lines with vacuum lines like i did

 

about as hard as it is to read a service manual and follow the directions that it gives you