Rep Power: 0

at 35-45 mph there is a slight vibration in the front passenger area. the car is a 2004 civic lx coupe. i do have aftermarket rims 18" and lowering kit, but this problem just started. please help, and hopefully it's a cheap resolve. i've spent way too much in repairs in the past month.

 
Rep Power: 217

Have you had your wheels balanced at all? Could be something as simple as that.

 
Rep Power: 285

Check to see if your front lower control arm bushings are torn, that can also cause vibrations at speed.

 
Rep Power: 247

You mentioned you had work recently. What was repaired? I had 2 main shaft and 1 counter shaft bearing replaced in my 5spd trans and after the dealer removed my subframe to do it, i got a wobble myself. Courious!!!!

 
Rep Power: 223

^X2 check the balance. If something is off balance youll feel the car wobbling. if you've had them balanced or feel the shimmy in the steering wheel and not the car i'd recommend you check:
1. lug nuts
2. axle nut
3. tie rods
4. ball joints
5. tire pressure
6. tire tread
7. CV axles
8. engine mounts

 
Rep Power: 0

headers was the main repair.

 
Rep Power: 0

headers was the main repair