i just bought my dc 4-1 header to my friend and he gave me his manifold to... so when i installed it the join betwwen the manifold and the exhaust pipe didn`t seal at all so it`s you can say no union between them..
here`s my quest. is it posible that my air/fuel mixt guage isn`t reading good the mixture because of that. before it was always rich now it`s reading too poor red to orange all time....

please let me know so i can sleep good thanks guys

 

please help me out there you experts