Exhaust popping on overrun but no air leaks

[Davsurfa]

My car is a Rev3 G-Ltd, it has induction kit and a japspeed back box(so no cat) with original headers and b-pipe. I've had the car up on ramps and been all over the exhaust system found no leaks, but when I come off the throttle it pops and burbles. Any ideas why?

[al/c]

you,ve answered your own question ....decat & induction kit will do it mate

[Davsurfa]

Oh, fair enough then I'll stop checking the exhaust over every time I get it on a ramp cheers