I have a 2003 Honda Civic LX. I'm trying where the blow off valve (BOV) line connects to my stock intake manifold. Do I need to make a "T" splice? Or do I need to swap my intake manifold to a 96-99
Honda Civic EX? Need help. Thank you.

 

If your car is now turbo charged, and you are running a bov or even a recirculating (bypass) valve, the valve needs to see boost/vacuum to function. So if you let off the gas the throttle body closes, now the lower pressure downstream of the TB lets the bov open and release the higher pressure now between the TB and the turbo. So anywhere you get vacuum is fine. As long as you don't have something else like a check valve or hvac item closing off the source of vacuum (from the intake). It doesn't have to be a big hose or anything. Any little 1/4 vac line under the hood will do, just tee into it.

 

Cool. I see one 1/4 hose and it's connected to a 1 psi pressure regulator. This hose is connected to the back of the intake manifold. I'll try to tee on that one. Thanks