ok, so whats the difference between a 4-1 header and a 4-2-1 header? what kind of performance differences do they both offer? im just a little bit confused on which header to buy. im thinking the pacesetter because its real nice and cheap, but the vibrant also looks very nice.

 

4-1 header is designed for more top end with the possibility of a slight loss downlow. A 4-2-1 header is designed more for mid range and torque, but will also give goo top end.

On our cars, my opinion is a 4-2-1 header FTW!