good

Great staff and fast free shipping.

Sounds great and was exactly what I wanted to hear not to loud but not quiet at all the only problem I ran into was the 2 bolt holes that connected to the front of the car were to narrow so I needed to drill and file it out a tad. Also very happy with No CEL!!

Fast shipping and excellent service. A set of LEDs I bought three years ago had died, well out of warranty yet K5 gave me a discount on a new set anyways.

Quick shipping.

Great communication and professionalism. Thanks!

Fast shipping. Excellent costumer service.

Most comfortable springs I had in a while

Good look, good ride, and cheep. Thanks

Got product as it was good condition

Looks great very good fit

Perfect all around, thanks

Loved them, just wish the wheel emblems were also all black but the black and silver still looks great and I am happy

Perfect fit and looks amazing!

Fuel door looks great! I love buying from k5optimastore! S/O them.

Excellent service and product.

A real bov that protects the turbos, looks awesome, sounds even cooler.

Lite weight, Looks Great Matching Locks

Awesome

Fits perfectly and packaged very well. Shipping was fast and it sounds very good.