Hi all ...
Sorry for another thread on this . I have used the search but wanted more specific answers. I am looking into getting a new exhaust for my zed , originally a invidia or miltek with Berks HFC ..... As you can see from my choices I want a mid noise level exhaust with no drone . I was able to get a ride in a zed with the invidia / Berks combo ....was really nice but maybe a tad to loud/drone for me . My main issue is that I keep reading / hearing from people who run the Berks they don't pass the mot ... This worries me , as you might as well run decats . Also what actual power gains are there from HFC ? 5hp ? Yes I know they sound nice but actual ftlb/bhp gain? The cobra ones are just to much money if all your going to gain is 5bhp . Now this brings me to the next question .... What bhp gain would you get from a cat back exhaust ? Obviously you will only gain bhp after a uprev map .... But say you put the same car ( both with uprev) one with an cat back and the other standard .... 5-8bhp?
Another question ( sorry )
Is there any real gain from a cheap ( scorpion ) to a more expensive ( invidia) exhaust other than build quality ? I've noticed that the scorpion is only a 2.5 " and others are 3" or dual ..... Does this matter ? Does it relate to more bhp . On my last zed I had a scorpion and loved it but am I robbing my car of bhp ( after a map) if I run a 2.5" pipe?
Last one!
What increase in bhp ftlb does a standard HR make just with uprev ? Obviously all different from car to car but just after general gains
Thank for all your help