first off i CANT type..does anyone know if the tubular exhaust manifold of a 1.8 litre flows as good as a shrk racing 421 header...my friend had a aftermarket header on his 98 tibby and on my 97 elantra it came with a header style manifold that i cut the brackets off of and thermal wrapped...the pipes look the same diameter...just wondering since i dont care about looks and just want speed. which would be best? not doing turbo going super on it<img src=icon_smile_big.gif border=0 align=middle>