^Ever since I changed the exhaust on my Z (7years ago?) the car would fart and pop. Then I fuel injected it and it got worse. First I thought it was really cool, and it was because my 140hp car was a true performer. Lol. Eventually changed the full exhaust again (manifold to muffler) and added a turbo charger. The popping increased (despite tuning to keep it down). Now rocking 230hp, this thing could take down a McLaren with the noises it makes.
Made my exhaust manifold last winter and installed it. Noises gone. Apparently it was an exhaust leak
So much nicer to drive.