We work directly with you to choose the right spring rates and setup for your car at no extra cost. Your suspension is not built until we have reviewed your use, goals, and confirmed the final spec with you.

Prefer to keep it simple? Our default specs are carefully chosen for each chassis using real world testing, years of consultation data, and feedback from drivers just like you.

We develop on real cars: measuring motion ratios, wheel rates, and tire behavior so the final product works outside the lab.

Assembled and quality-checked by enthusiasts for enthusiasts, not a mass-produced catalog product.

Annex kits are used by track day drivers, time-attack builds, and daily commuters worldwide. From Speed Academy to SavageGeese and Throtl projects, our setups are chosen for feel and function, not marketing dyno charts.

We build suspension we believe in. If your kit doesn’t deliver the improvement we promised, we’ll help tune it,  and if you’re still not happy, you’re covered by our money-back guarantee.