Pop bangs!?!?!? Tell me more (in newbie layman's language please!)
You can map the car so that on overrun (off the throttle, revs dropping, low load) the car will dump a bit of fuel into the exhaust where it will ignite and give somewhere between a little pop to an almighty bang and flames. Can look quite cool, but not sure its the best for the Zed! A little popping could sound nice though. Google it, usually on Scoobies, Evos, Focus RS. Not sure how well it works on NA cars.