hi guys,

just needing a bit of advice, on a header.
I am in south africa (hence the time of posting) and it is a little difficult to get the branded headers, as after importing the prices are ridiculous. my best option is to get it custom made. i have been doing some research on what diameter tubes i should be using. my car has a stock b18b motor, 2.5 inch exhaust, short ram induction and piggy back chip. i plan on putting in a set of crower 403's in the near future.

i understand that the bigger headers are for the higher reving motors, what is the tube sizes I should be considering for good gains? will a 42mm tube be too big?

i am new to the modifiying scene, and am not sure if this question has been asked before.

thanks in advance.

 

I would post this in the "all motor" section imo just get a cheap ebay header....