STi Billet Front Upright Kit – Full Spectrum Performance
STi Billet Front Upright Kit

STi Billet Front Upright Kit

Regular price $2,159

We are currently running a group buy on our corrected geometry front upright kit for the 5x114.3 STi. This promotion will run until October 15. The listed price is for 10-14 buyers, and the price will drop to $1749.00 once we hit 15 or more. As this is a low-volume item, we are batching these and expect an 8-10 week production timeline. We expect to have kits delivered by December 20th, 2019. Please send us a message to inquire.

So, what did we do differently?

We removed over 5lbs per upright by making extensive use of aerospace grade 7075 T651 aluminum alloy. This equates to over 10lbs of unsprung mass removed from the front end of the car. We've added an extended strut ear allowing for improved tire/spring clearance. We've also added the IZZE Racing IR temperature sensor mount (useful for keeping tabs on brake rotor temps on track), and We've managed to keep the weight of the piece right at 6lbs (without hardware). Roll center correction is a generous 1.98" compared to GD uprights and 1.77" compared to GV/GR uprights. This was done in an effort to make the units less expensive, less complex, and more rigid. We've retained the double shear rod end mounting arms from the first design, and the unit allows for over 1.25" of bump steer adjustment. The upright also features a dual wheel speed sensor location with an adapter that allows the upright to be used interchangeably on the GD, GV/GR, and VA chassis model STI.

- machined from 7075 T651 aluminum, an alloy with better strength and weight properties than the OEM cast iron
- 6 pounds without hardware, a 44% reduction from the OEM GV piece and a 47% reduction from the GD unit
- GV/GR roll center correction is 1.77" compared to OEM
- GD roll center correction is 1.98" compared to OEM
- steering tie rod is mounted in a double shear configuration with over 1.25" of bump steer adjustment
- increased inboard clearance for wider wheels and tires
- included mount for IZZE Racing brake rotor temperature sensor
- OEM brake caliper compatibility
- OEM balljoint compatibility
- OEM 5x114.3 Subaru hub compatible

Note: An 18 inch wheel diameter is recommended when considering this kit as the increase in balljoint drop from hub bore and the extended rod end mount location could cause interference with certain wheel designs in diameters smaller than 18". To check this, the smallest diameter point of the wheel barrel inner diameter needs to exceed 15.5 inches diameter in order to properly clear these uprights.



This is an aftermarket motorsport product intended for closed-course off-road use only. By purchasing this product, the buyer agrees that motorsport is inherently dangerous and willingly accepts all risks associated with motorsport competition. The buyer hereby assumes all risks associated with the use of this product and waives all liability claims against the seller of any kind or nature, including liability for penalties, fines, property damage, personal injury or death, to the fullest extent permitted by law. Additionally, buyer acknowledges and agrees that seller is not liable for and hereby excludes any and all indirect, incidental, special or consequential damages relating to this product. 

STi Billet Front Upright Kit
STi Billet Front Upright Kit