do they help alot with my setup or wii stright pipes work just as well.

 

the x-pipe evens out exhaust pulses bewteen the cylinder banks so both pipes have the same amount of air flowing through them for a less restrictive exhaust plus it will take out some of the raspiness of straight pipes. I ave one on my dual setup but Im ditching it all for a catless corsa system and electric cutout Im tired of all the noise all teh time.