Fumes in the cabin

[drifttube123]

Hi Guys,

I am running an AA stage 1sc with AA Hfc and x pipe. It runs and feels great but the smell of the exhaust fumes are pretty strong. When I'm driving at low speeds or especially if I'm stopped, I have to turn my vents to recycle. Otherwise the cabin smells fumy with in seconds. When I'm stopped, if I sniff around the windshield, it smells like exhaust fumes (not coming from tail pipes). Is this normal for this set up?

I've had my mechanic check for exhaust leaks but he couldn't find any. He said that because I have the sc, the car is running rich and there will be a smell. Has anyone had a similar experience or solution?

Thanks!