I would like some input from the rotor gods before i rice out my car.




I have a black FD with a feed front bumper, carbon feed hood, feed side skirts, and some five spoke 18 inch rims. I have a single turbo with a little over 400 to the wheels at 17 lbs. The car is fast so im not putting a wing on the car for looks. When I have been driving it the back end starts to wander on the highway. I was wondering if a rear diffuser is going to help put more down force on the car and get the back end from feeling light or should i put a wing on the car. It is a daily driver. I just dont want to look like a tool driving around with a wing if i dont really need it




Looking at an auto exe rear wing








or a sanai works rear diffuser

 

I really like that rear-diffuser...

I'd get that first.

 

Totally agree with ^.

 

that wing doesnt look good, since you allready have alot of feed parts on your car, why not put the adjustable feed wing on it, its quite nice and looks like it could bo stock
allso the 99 wing looks really good

 

For the most part, a diffuser is "free" as far as downforce goes. Wings add downforce but at the cost of increased drag. However, it's debatable as to how much downforce a diffuser truly adds without tailoring the entire airflow under the car.

That being said, your car shouldn't "wander" on the road regardless of how much power you have. What suspension is on the car and how old is it?

 

I have stock suspension with k sport coilovers. I have had a guy look at it and he said the suspension is tight and nothing is wrong with it. A lady owned the car before me and was the original owner and never beat on the car. I have loose wheel bearings in the car right now and i think that is what was having the car move side to side. But if the car still wanders after I get the wheel bearings replaced then i want to get something. I have tried to move everything under the car and it is solid.

 

Wandering = bad suspension (shocks, bushings) or bad alignment

Its not easy trying to find a good alignment shop...

 

After the wheel bearing are replaced im going to lower the car a 1/2 to an inch. then I will realign the car again. I dont think its the alignment. I can move the wheels side to side and that is bad.