Hi i have a supercharger kit in my cavalier 2.4L LD9 with 4-2-1 header from Rksport, I have listened for a friend that the header 4 - 1 are better I need help in this, thanks

Any non stock header is 'better'

What he was getting at is, since you're forced induction, you want the exhaust gasses to leave as quick as possible,
4-1 allows for that.

Now, if you like the way you car is performing, then I say dont worry about it.

Esp. since I'm sure you had more than a headache to get the thing in, in the first place.

-M


Remember....syringes go in the RED waste basket.

Ok thanks, i have in mind to add other parts as light pulleys pistons and forged connecting rods, this header 4-2-1 will serve me if it increases the power of the motor?