Ok so I installed headers myself on there and the Y downpipe from the headers that connects to the cat wouldn't fit..so I took it 2 a shop for them 2 weld it on...I ran open headers to the shop about quarter of a mile away and it ran beautifly..got it bak its runnin like ****..has no acceleration...I can put it all the way 2 the floor taking off and it will barely go..once it hits second gear then it takes off like a bat out of hell and correctly..plz help me ?!?!

 

Helppppppppp