KB03gtvert

Thanks for any help in advance. Car now has a very noticeable popping coming from the drivers side pipe I have less than a month old MSD coil ons , 36# injectors from Kenne bell , NKG-6 sparkplugs properly gapped ( rechecked it all this morning) can feel a slight stumble at around 1500-2000 rpm on very light load going to check the O2's when the car cools. posting 2 videos maybe someone has some insight on whats up. Just praying its not the valve train. thanks.

http://s427.photobucket.com/albums/p...t=MOV00224.flv

http://s427.photobucket.com/albums/p...t=MOV00226.flv