since i had my exhaust done there has been a air leak from somewhere in the engine, i took it back to have the exhaust checked and they said theres no leaks in the joins etc. so im unsure where it comes from anyone have any advice as i hate paying people to tell me something basic that most people know:p lol
thanx

what does it sound like a grunty type
check your air filter cause if it is not put in properly you might get that sound

hold a rag by hand over the exhaust tip to seal it at idle.
if it has a leak anywhere else in the exhaust system you will soon hear it with the tip restricted.