first question is do s5 n/a 6 port systems run off of back pressure, cause i have a strait pipe to duel rb mufflers, no cat or anything, when i got this done i could tell a difference in low end torque, but not top end how do i test this,

 

s5 5/6th ports are run off of airpump. s4 is run off of exaust backpressure.

 

so i can open up my exhaust as much as i want to then right, how do you test to see if its working propersly

 

to test if the actuators work, put some grease on the rod. and then take it for a hard drive. if the grease is rubbed off. it means they are working. that is the ghetto way to test them. im sure there are better

 

Only works on S4's. S5's are pull and the grease wouldn't even be touched. Best way is to open the hood. Rev your motor by hand or have some one rev it in the car to redline. Watch the actuators and you'll see them move.

 

i thot they only moved in gear

 

^^ thanks for correcting me. i didnt realize that you couldnt test the s5 actuators like i said.