Outer Limits 4x4 Board

Hi
What is the difference between 4->1 and 4->2->1???
and which hedder is suitable for our application???

4-1 and 4-2-1 describe the layout of the extractors. A 4-1 has 4 pipes (1 of each exhaust port) that run into one pipe. A 4-2-1 has 4 pipes (of the exhaust ports) that run into 2 pipes then into 1 pipe. THe 4-1 setup geives better top end, while a 4-2-1 setup gives better midrange, so is better for the majority of 4 wheeling.
Layto....

Are the coily extracters the same as all other 1.3's. I've heard they need to be modified to stop fouling up?

yeah cause coilies are lower to the ground!!

85zook wrote:yeah cause coilies are lower to the ground!!